CN108727179A - 一种α-烯丙基取代的α,β-不饱和酮、酯或腈化合物的合成方法 - Google Patents

一种α-烯丙基取代的α,β-不饱和酮、酯或腈化合物的合成方法 Download PDF

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CN108727179A
CN108727179A CN201810788951.8A CN201810788951A CN108727179A CN 108727179 A CN108727179 A CN 108727179A CN 201810788951 A CN201810788951 A CN 201810788951A CN 108727179 A CN108727179 A CN 108727179A
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马献涛
于静
江梦园
燕然
唐林
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Abstract

本发明提供了一种α‑烯丙基取代的α,β‑不饱和酮、酯或腈化合物的合成方法。该方法使用烯丙基醇为烷基化试剂,与磷叶立德在烯丙基氯化钯(II)二聚体、双膦配体催化体系作用下,于20~100℃条件下在反应溶剂中搅拌反应6~24小时,再经过一锅法的Wittig反应,制备α‑烯丙基取代的α,β‑不饱和酮、酯或腈化合物。该方法简单、原料易于获得、反应条件温和。本方法对反应条件的要求较低,可利用芳基、杂芳基和脂肪型烯丙基醇类作为烷基化试剂,实现酮基、酯基以及氰基稳定磷叶立德的一锅法烯丙化‑Wittig反应,具有较广的适用范围,也应具有一定的研究和工业应用前景。

Description

一种α-烯丙基取代的α,β-不饱和酮、酯或腈化合物的合成 方法
技术领域
本发明属于化学合成领域,具体涉及一种α-烯丙基取代的α,β-不饱和酮、酯或腈化合物的合成方法。
背景技术
α,β-不饱和酮、酯和腈是重要的合成中间体,被广泛地应用于有机合成中。同时许多药物活性分子中也存在α-取代的α,β-不饱和酮、酯或腈结构单元,因此开展α-烯丙基取代的α,β-不饱和酮、酯或腈化合物的合成研究有着重要的价值。
文献中报道的合成方法主要有:1)钯催化下烯丙基醋酸酯与α,β-不饱和酮发生MBH反应,但是该方法需要钯催化剂量较大(10mol%),同时需要加入过量的磷试剂、醋酸(1.0当量以上)等来促进反应的进行;2)稳定磷叶立德的烯丙化-Wittig反应,但是文献中采用的烯丙化试剂主要是商业难以获得的烯丙基碳酸酯、烯丙基胺化合物,并且反应中均需要加入添加剂(酸或碱)来促进反应,且反应温度较高(≥100℃)。以上方法通常仍需在高毒、容易挥发的有机溶剂中进行,因此,仍有很多缺点,亟待改进。
发明内容
本发明主要目的在于提供一种催化方法:使用来源广泛、廉价易得、稳定低毒的烯丙基醇类为烷基化试剂,在温和条件下,与酮基、酯基和氰基稳定的磷叶立德一锅法烯丙化-Wittig反应制备α-烯丙基取代的α,β-不饱和酮、酯或腈化合物。
本发明采用以下技术方案:
一种α-烯丙基取代的α,β-不饱和酮、酯或腈化合物的合成方法,以烯丙基醇与磷叶立德为反应底物,在烯丙基氯化钯(II)二聚体和双膦配体催化体系作用下,一锅法烯丙化-Wittig反应制备α-烯丙基取代的α,β-不饱和酮、酯或腈化合物。
进一步地,所述烯丙基氯化钯(II)二聚体的用量为0.5~10mol%。
进一步地,所述烯丙基氯化钯(II)二聚体的用量为1~2.5mol%。
进一步地,其特征在于,所述双膦配体为1,2-双(二苯膦)乙烷(dppe)、1,4-双(二苯膦)丁烷(dppb)、1,5-双(二苯膦)戊烷(dppp)或1,1'-双(二苯基膦)二茂铁(dppf),双膦配体的用量为2~40mol%。
进一步地,所述双膦配体为1,1'-双(二苯基膦)二茂铁(dppf),其用量为4~10mol%。
进一步地,具体步骤如下:
将烯丙基醇、磷叶立德、烯丙基氯化钯(II)二聚体和双膦配体加到反应溶剂中,在氮气气氛中于20~100℃条件下搅拌反应6~24小时,然后加入甲醛溶液,室温下搅拌反应6~12小时,得α-烯丙基取代的α,β-不饱和酮、酯或腈化合物,
反应式为:
其中:
R1是-H、苯基、杂芳基或烷基;
R2是-H、烷基或苯基;
R3是-H、烷基或苯基;
R4是酮基、酯基或氰基;
所述反应溶剂为醇、水或醇的水溶液。
进一步地,所述反应溶剂为甲醇、乙醇或水。
进一步地,Wittig反应在氮气或空气下进行。
进一步地,烯丙化反应的反应温度为30~60℃,反应时间为6~12小时。
进一步地,所述甲醛溶液为37%甲醛水溶液。
本发明的有益效果在于:
1、本发明中所使用的烯丙基醇、催化剂、配体等试剂普遍商品化,可以直接购买得到。
2、本方法可使用廉价易得、来源广泛、稳定低毒、绿色的烯丙基醇类化合物为烷基化试剂,在较为温和的反应温度下,较低催化剂用量的条件下,以醇、水或醇的水溶液作为反应溶剂实现α-烯丙基取代的α,β-不饱和酮、酯或腈化合物的高效制备。本方法对反应条件的要求较低、适用范围较广,与已知方法相比优势明显,具有潜在广泛的应用前景。
具体实施方式
以下实施例用于说明本发明,但不用来限定本发明的保护范围。若未特别指明,实施例中所用技术手段为本领域技术人员所熟知的常规手段。
实施例1肉桂醇和苯甲酰基磷叶立德制备α-烯丙基取代的α,β-不饱和酮
向管形反应器中依次加入肉桂醇(48.2mg,0.36mmol,1.2equiv.),苯甲酰基磷叶立德(114.0mg,0.30mmol),烯丙基氯化钯(II)二聚体(2.8mg,2.5mol%),dppf(16.6mg,10mol%)和无水甲醇(0.5mL),然后抽真空,氮气保护,在60℃条件下反应12h。TLC监测反应完全后,加入37%甲醛水溶液(0.068mL,0.90mmol),室温下搅拌反应6h。产物用柱色谱分离提纯(展开剂石油醚/乙酸乙酯=30/1),分离收率86%。
产物的核磁谱为:1H NMR(400MHz,CDCl3)δ7.78-7.75(m,2H),7.55-7.50(m,1H),7.46-7.40(m,2H),7.38-7.34(m,2H),7.31-7.27(m,2H),7.21-7.17(m,1H),6.51(d,J=16.0Hz,1H),6.29(dt,J=16.0,7.2Hz,1H),5.90(d,J=0.8Hz,1H),5.69(d,J=0.8Hz,1H),3.35(dd,J=7.2,0.8Hz,2H);13C NMR(100MHz,CDCl3)δ198.0,146.7,137.9,137.5,132.5,132.3,129.6,128.7,128.3,127.4,126.7,126.6,126.3,35.6。
本实施例反应式如下:
实施例2肉桂醇和苯甲酰基磷叶立德制备α-烯丙基取代的α,β-不饱和酮
向管形反应器中依次加入肉桂醇(48.2mg,0.36mmol,1.2equiv.),苯甲酰基磷叶立德(114.0mg,0.30mmol),烯丙基氯化钯(II)二聚体(2.8mg,2.5mol%),dppf(16.6mg,10mol%)和水(0.5mL),然后抽真空,氮气保护,在60℃条件下反应12h。TLC监测反应完全后,加入37%甲醛水溶液(0.068mL,0.90mmol),室温下搅拌反应6h。产物用柱色谱分离提纯(展开剂石油醚/乙酸乙酯=30/1),分离收率96%。
产物的核磁谱为:1H NMR(400MHz,CDCl3)δ7.78-7.75(m,2H),7.55-7.50(m,1H),7.46-7.40(m,2H),7.38-7.34(m,2H),7.31-7.27(m,2H),7.21-7.17(m,1H),6.51(d,J=16.0Hz,1H),6.29(dt,J=16.0,7.2Hz,1H),5.90(d,J=0.8Hz,1H),5.69(d,J=0.8Hz,1H),3.35(dd,J=7.2,0.8Hz,2H);13C NMR(100MHz,CDCl3)δ198.0,146.7,137.9,137.5,132.5,132.3,129.6,128.7,128.3,127.4,126.7,126.6,126.3,35.6。
本实施例的反应式如下:
实施例3肉桂醇和苯甲酰基磷叶立德制备α-烯丙基取代的α,β-不饱和酮
向管形反应器中依次加入肉桂醇(48.2mg,0.36mmol,1.2equiv.),苯甲酰基磷叶立德(114.0mg,0.30mmol),烯丙基氯化钯(II)二聚体(10.9mg,10mol%),dppf(66.5mg,40mol%)和水(0.5mL),然后抽真空,氮气保护,在60℃条件下反应12h。TLC监测反应完全后,加入37%甲醛水溶液(0.068mL,0.90mmol),室温下搅拌反应6h。产物用柱色谱分离提纯(展开剂石油醚/乙酸乙酯=30/1),分离收率96%。
产物的核磁谱为:1H NMR(400MHz,CDCl3)δ7.78-7.75(m,2H),7.55-7.50(m,1H),7.46-7.40(m,2H),7.38-7.34(m,2H),7.31-7.27(m,2H),7.21-7.17(m,1H),6.51(d,J=16.0Hz,1H),6.29(dt,J=16.0,7.2Hz,1H),5.90(d,J=0.8Hz,1H),5.69(d,J=0.8Hz,1H),3.35(dd,J=7.2,0.8Hz,2H);13C NMR(100MHz,CDCl3)δ198.0,146.7,137.9,137.5,132.5,132.3,129.6,128.7,128.3,127.4,126.7,126.6,126.3,35.6。
本实施例的反应式如下:
实施例4肉桂醇和苯甲酰基磷叶立德制备α-烯丙基取代的α,β-不饱和酮
向管形反应器中依次加入肉桂醇(48.2mg,0.36mmol,1.2equiv.),苯甲酰基磷叶立德(114.0mg,0.30mmol),烯丙基氯化钯(II)二聚体(1.1mg,1mol%),dppf(6.6mg,4mol%)和水(0.5mL),然后抽真空,氮气保护,在60℃条件下反应12h。TLC监测反应完全后,加入37%甲醛水溶液(0.068mL,0.90mmol),室温下搅拌反应6h。产物用柱色谱分离提纯(展开剂石油醚/乙酸乙酯=30/1),分离收率45%。
产物的核磁谱为:1H NMR(400MHz,CDCl3)δ7.78-7.75(m,2H),7.55-7.50(m,1H),7.46-7.40(m,2H),7.38-7.34(m,2H),7.31-7.27(m,2H),7.21-7.17(m,1H),6.51(d,J=16.0Hz,1H),6.29(dt,J=16.0,7.2Hz,1H),5.90(d,J=0.8Hz,1H),5.69(d,J=0.8Hz,1H),3.35(dd,J=7.2,0.8Hz,2H);13C NMR(100MHz,CDCl3)δ198.0,146.7,137.9,137.5,132.5,132.3,129.6,128.7,128.3,127.4,126.7,126.6,126.3,35.6。
本实施例的反应式如下:
实施例5肉桂醇和苯甲酰基磷叶立德制备α-烯丙基取代的α,β-不饱和酮
向管形反应器中依次加入肉桂醇(48.2mg,0.36mmol,1.2equiv.),苯甲酰基磷叶立德(114.0mg,0.30mmol),烯丙基氯化钯(II)二聚体(0.55mg,0.5mol%),dppf(3.3mg,2mol%)和水(0.5mL),然后抽真空,氮气保护,在60℃条件下反应12h。TLC监测反应完全后,加入37%甲醛水溶液(0.068mL,0.90mmol),室温下搅拌反应6h。产物用柱色谱分离提纯(展开剂石油醚/乙酸乙酯=30/1),分离收率39%。
产物的核磁谱为:1H NMR(400MHz,CDCl3)δ7.78-7.75(m,2H),7.55-7.50(m,1H),7.46-7.40(m,2H),7.38-7.34(m,2H),7.31-7.27(m,2H),7.21-7.17(m,1H),6.51(d,J=16.0Hz,1H),6.29(dt,J=16.0,7.2Hz,1H),5.90(d,J=0.8Hz,1H),5.69(d,J=0.8Hz,1H),3.35(dd,J=7.2,0.8Hz,2H);13C NMR(100MHz,CDCl3)δ198.0,146.7,137.9,137.5,132.5,132.3,129.6,128.7,128.3,127.4,126.7,126.6,126.3,35.6。
本实施例的反应式如下:
实施例6 1-苯基烯丙基醇和苯甲酰基磷叶立德制备α-烯丙基取代的α,β-不饱和酮
向管形反应器中依次加入1-苯基烯丙基醇(48.2mg,0.36mmol,1.2equiv.),苯甲酰基磷叶立德(114.0mg,0.30mmol),烯丙基氯化钯(II)二聚体(2.8mg,2.5mol%),dppf(16.6mg,10mol%)和水(0.5mL),然后抽真空,氮气保护,在60℃条件下反应12h。TLC监测反应完全后,加入37%甲醛水溶液(0.068mL,0.90mmol),室温下搅拌反应6h。产物用柱色谱分离提纯(展开剂石油醚/乙酸乙酯=30/1),分离收率93%。
产物的核磁谱为:1H NMR(400MHz,CDCl3)δ7.78-7.75(m,2H),7.55-7.50(m,1H),7.46-7.40(m,2H),7.38-7.34(m,2H),7.31-7.27(m,2H),7.21-7.17(m,1H),6.51(d,J=16.0Hz,1H),6.29(dt,J=16.0,7.2Hz,1H),5.90(d,J=0.8Hz,1H),5.69(d,J=0.8Hz,1H),3.35(dd,J=7.2,0.8Hz,2H);13C NMR(100MHz,CDCl3)δ198.0,146.7,137.9,137.5,132.5,132.3,129.6,128.7,128.3,127.4,126.7,126.6,126.3,35.6。
本实施例的反应式如下:
实施例7 4-甲氧基肉桂醇和苯甲酰基磷叶立德制备α-烯丙基取代的α,β-不饱和酮
向管形反应器中依次加入4-甲氧基肉桂醇(59.0mg,0.36mmol,1.2equiv.),苯甲酰基磷叶立德(114.0mg,0.30mmol),烯丙基氯化钯(II)二聚体(2.8mg,2.5mol%),dppf(16.6mg,10mol%)和水(0.5mL),然后抽真空,氮气保护,在60℃条件下反应12h。TLC监测反应完全后,加入37%甲醛水溶液(0.068mL,0.90mmol),室温下搅拌反应6h。产物用柱色谱分离提纯(展开剂石油醚/乙酸乙酯=10/1),分离收率92%。
产物的核磁谱为:1H NMR(400MHz,CDCl3)δ7.78(dd,J=8.0,1.6Hz,2H),7.54–7.50(m,1H),7.43–7.39(m,2H),7.31–7.26(m,2H),6.86–6.81(m,2H),6.46(d,J=15.6Hz,1H),6.16(dt,J=15.6,6.8Hz,1H),5.90(d,J=0.8Hz,1H),5.68(d,J=0.8Hz,1H),3.76(s,3H),3.33(dd,J=7.2,0.8Hz,2H);13C NMR(100MHz,CDCl3)δ197.5,159.0,146.7,137.5,132.0,131.7,130.0,129.4,128.0,127.0,126.3,124.1,114.0,55.1,35.2。
本实施例的反应式如下:
实施例8 4-三氟甲基肉桂醇和苯甲酰基磷叶立德制备α-烯丙基取代的α,β-不饱和酮
向管形反应器中依次加入4-三氟甲基肉桂醇(72.7mg,0.36mmol,1.2equiv.),苯甲酰基磷叶立德(114.0mg,0.30mmol),烯丙基氯化钯(II)二聚体(2.8mg,2.5mol%),dppf(16.6mg,10mol%)和水(0.5mL),然后抽真空,氮气保护,在60℃条件下反应12h。TLC监测反应完全后,加入37%甲醛水溶液(0.068mL,0.90mmol),室温下搅拌反应6h。产物用柱色谱分离提纯(展开剂石油醚/乙酸乙酯=30/1),分离收率83%。
产物的核磁谱为:1H NMR(400MHz,CDCl3)δ7.73(dd,J=7.6,2.4Hz,2H),7.58–7.40(m,7H),6.51(d,J=16.0Hz,1H),6.37(dt,J=16.0,6.4Hz,1H),5.92(d,J=0.8Hz,1H),5.72(d,J=0.8Hz,1H),3.40(dd,J=6.4,0.8Hz,2H);13C NMR(100MHz,CDCl3)δ197.8,146.2,140.9,137.8,132.5,131.2,129.7,129.6,128.3,127.2,126.1,125.2(q,J=7.2Hz),35.1。
本实施例的反应式如下:
实施例9 3-吡啶基烯丙醇和苯甲酰基磷叶立德制备α-烯丙基取代的α,β-不饱和酮
向管形反应器中依次加入3-吡啶基烯丙醇(48.6mg,0.36mmol,1.2equiv.),苯甲酰基磷叶立德(114.0mg,0.30mmol,),烯丙基氯化钯(II)二聚体(2.8mg,2.5mol%),dppf(16.6mg,10mol%)和水(0.5mL),然后抽真空,氮气保护,在60℃条件下反应12h。TLC监测反应完全后,加入37%甲醛水溶液(0.068mL,0.90mmol),室温下搅拌反应6h。产物用柱色谱分离提纯(展开剂石油醚/乙酸乙酯=10/1),分离收率80%。
产物的核磁谱为:1H NMR(400MHz,CDCl3)δ8.60(s,1H),8.45(d,J=4.0Hz,1H),7.79–7.74(m,2H),7.72–7.68(m,1H),7.59–7.55(m,1H),7.48–7.44(m,2H),7.26–7.20(m,1H),6.51(d,J=16.0Hz,1H),6.40(dt,J=16.0,6.8Hz,1H),5.97(d,J=0.8Hz,1H),5.75(d,J=0.8Hz,1H),3.43(dd,J=6.8,0.8Hz,2H);13C NMR(100MHz,CDCl3)δ197.5,148.4,148.2,146.2,137.8,133.0,132.5,129.5,129.4,129.1,128.9,128.4,127.1,123.3,35.4。
本实施例的反应式为:
实施例10 E-2-己烯1-醇和苯甲酰基磷叶立德制备α-烯丙基取代的α,β-不饱和酮
向管形反应器中依次加入E-2-己烯1-醇(36.0mg,0.36mmol,1.2equiv.),苯甲酰基磷叶立德(114.0mg,0.30mmol,),烯丙基氯化钯(II)二聚体(2.8mg,2.5mol%),dppf(16.6mg,10mol%)和无水甲醇(0.5mL),然后抽真空,氮气保护,在60℃条件下反应12h。TLC监测反应完全后,加入37%甲醛水溶液(0.068mL,0.90mmol),室温下搅拌反应6h。产物用柱色谱分离提纯(展开剂石油醚/乙酸乙酯=30/1),分离收率82%。
产物的核磁谱为:1H NMR(400MHz,CDCl3)δ7.77(d,J=6.8Hz,2H),7.56–7.51(m,1H),7.47–7.41(m,2H),5.89(d,J=0.8Hz,1H),5.63(d,J=0.8Hz,1H),5.59–5.43(m,2H),3.17(dd,J=6.4,0.8Hz,2H),2.03(dt,J=12.8,6.4Hz,2H),1.45–1.37(m,2H),0.89(t,J=7.2Hz,3H);13C NMR(100MHz,CDCl3)δ198.0,147.5,138.0,133.7,132.3,129.8,128.3,126.5,125.6,35.3,34.8,22.9,13.8。
本实施例的反应式如下:
实施例11肉桂醇和4-甲氧基苯甲酰基磷叶立德制备α-烯丙基取代的α,β-不饱和酮
向管形反应器中依次加入肉桂醇(48.2mg,0.36mmol,1.2equiv.),苯甲酰基磷叶立德(123.0mg,0.30mmol,),烯丙基氯化钯(II)二聚体(2.8mg,2.5mol%),dppf(16.6mg,10mol%)和水(0.5mL),然后抽真空,氮气保护,在60℃条件下反应12h。TLC监测反应完全后,加入37%甲醛水溶液(0.068mL,0.90mmol),室温下搅拌反应6h。产物用柱色谱分离提纯(展开剂石油醚/乙酸乙酯=10/1),分离收率86%。
产物的核磁谱为:1H NMR(400MHz,CDCl3)δ7.82–7.77(m,2H),7.35–7.30(m,2H),7.29–7.25(m,2H),7.20–7.17(m,1H),6.95–6.87(m,2H),6.46(d,J=15.6Hz,1H),6.25(dt,J=15.6,6.8Hz,1H),5.80(d,J=0.8Hz,1H),5.60(d,J=0.8Hz,1H),3.81(s,3H),3.35(dd,J=7.2,0.8Hz,2H);13C NMR(100MHz,CDCl3)δ196.2,163.0,146.5,137.2,132.2,132.0,130.0,128.4,127.0,126.6,126.1,124.4,113.4,55.3,35.6。
本实施例的反应式如下:
实施例12肉桂醇和4-氯苯甲酰基磷叶立德制备α-烯丙基取代的α,β-不饱和酮
向管形反应器中依次加入肉桂醇(48.2mg,0.36mmol,1.2equiv.),苯甲酰基磷叶立德(124.2mg,0.30mmol,),烯丙基氯化钯(II)二聚体(2.8mg,2.5mol%),dppf(16.6mg,10mol%)和无水甲醇(0.5mL),然后抽真空,氮气保护,在60℃条件下反应12h。TLC监测反应完全后,加入37%甲醛水溶液(0.068mL,0.90mmol),室温下搅拌反应6h。产物用柱色谱分离提纯(展开剂石油醚/乙酸乙酯=30/1),分离收率90%。
产物的核磁谱为:1H NMR(400MHz,CDCl3)δ7.75–7.66(m,2H),7.45–7.25(m,6H),7.24–7.18(m,1H),6.52(d,J=16.0Hz,1H),6.27(dt,J=16.0,7.2Hz,1H),5.95(d,J=0.8Hz,1H),5.67(d,J=0.8Hz,1H),3.38(dd,J=7.2,0.8Hz,2H);13C NMR(100MHz,CDCl3)δ196.5,146.2,138.8,137.5,135.7,132.6,130.8,128.5,128.6,127.5,126.7,126.4,126.3,35.4。
本实施例的反应式如下:
实施例13肉桂醇和2-呋喃酰基磷叶立德制备α-烯丙基取代的α,β-不饱和酮1h
向管形反应器中依次加入肉桂醇(48.2mg,0.36mmol,1.2equiv.),苯甲酰基磷叶立德(111.0mg,0.30mmol,),烯丙基氯化钯(II)二聚体(2.8mg,2.5mol%),dppf(16.6mg,10mol%)和无水甲醇(0.5mL),然后抽真空,氮气保护,在60℃条件下反应12h。TLC监测反应完全后,加入37%甲醛水溶液(0.068mL,0.90mmol),室温下搅拌反应6h。产物用柱色谱分离提纯(展开剂石油醚/乙酸乙酯=30/1),分离收率85%。
产物的核磁谱为:1H NMR(400MHz,CDCl3)δ7.60(dd,J=1.2,0.8Hz,1H),7.36–7.33(m,2H),7.30–7.26(m,2H),7.22–7.15(m,2H),6.52(dd,J=3.2,1.2Hz,1H),6.48(d,J=16.0Hz,1H),6.24(dt,J=16.0,7.2Hz,1H),6.08(d,J=0.8Hz,1H),5.85(d,J=0.8Hz,1H),3.36(dd,J=7.2,0.8Hz,2H);13C NMR(100MHz,CDCl3)δ183.0,151.5,146.7,146.0,136.8,132.0,128.0,126.9,126.0,125.8,124.3,119.4,111.6,35.0。
本实施例的反应式如下:
实施例14肉桂醇和叔丁基酰基磷叶立德制备α-烯丙基取代的α,β-不饱和酮
向管形反应器中依次加入肉桂醇(48.2mg,0.36mmol,1.2equiv.),苯甲酰基磷叶立德(108.0mg,0.30mmol,),烯丙基氯化钯(II)二聚体(2.8mg,2.5mol%),dppf(16.6mg,10mol%)和无水甲醇(0.5mL),然后抽真空,氮气保护,在60℃条件下反应12h。TLC监测反应完全后,加入37%甲醛水溶液(0.068mL,0.90mmol),室温下搅拌反应6h。产物用柱色谱分离提纯(展开剂石油醚/乙酸乙酯=30/1),分离收率88%。
产物的核磁谱为:1H NMR(400MHz,CDCl3)δ7.40–7.18(m,5H),6.40(d,J=16.0Hz,1H),6.16(dt,J=16.0,7.2Hz,1H),5.50(s,1H),5.46(s,1H),3.12(dd,J=7.2,1.2Hz,2H),1.20(s,9H);13C NMR(100MHz,CDCl3)δ210.3,146.5,137.0,132.1,128.2,126.8,126.2,125.7,117.9,43.6,37.1,27.4。
本实施例的反应式如下:
实施例15肉桂醇和乙酯基磷叶立德制备α-烯丙基取代的α,β-不饱和酯
向管形反应器中依次加入肉桂醇(48.2mg,0.36mmol,1.2equiv.),苯甲酰基磷叶立德(104.4mg,0.30mmol,),烯丙基氯化钯(II)二聚体(2.8mg,2.5mol%),dppf(16.6mg,10mol%)和无水甲醇(0.5mL),然后抽真空,氮气保护,在60℃条件下反应12h。TLC监测反应完全后,加入37%甲醛水溶液(0.068mL,0.90mmol),室温下搅拌反应6h。产物用柱色谱分离提纯(展开剂石油醚/乙酸乙酯=20/1),分离收率76%。
产物的核磁谱为:1H NMR(400MHz,CDCl3)δ7.40–7.20(m,5H),6.46(d,J=16.0Hz,1H),6.25(dt,J=16.0,7.2Hz,1H),6.24(s,1H),5.62(d,J=0.8Hz,1H),4.23(q,J=7.2Hz,2H),3.23(dd,J=7.2,0.8Hz,2H),1.31(t,J=7.2Hz,3H);13C NMR(100MHz,CDCl3)δ166.9,139.5,137.3,132.1,128.6,127.2,126.9,126.0,125.5,60.9,35.2,14.5。
本实施例的反应式如下:
实施例16肉桂醇和氰基磷叶立德制备α-烯丙基取代的α,β-不饱和腈
向管形反应器中依次加入肉桂醇(48.2mg,0.36mmol,1.2equiv.),苯甲酰基磷叶立德(90.3mg,0.30mmol,),烯丙基氯化钯(II)二聚体(2.8mg,2.5mol%),dppf(16.6mg,10mol%)和无水甲醇(0.5mL),然后抽真空,氮气保护,在60℃条件下反应12h。TLC监测反应完全后,加入37%甲醛水溶液(0.068mL,0.90mmol),室温下搅拌反应6h。产物用柱色谱分离提纯(展开剂石油醚/乙酸乙酯=30/1),分离收率66%。
产物的核磁谱为:1H NMR(400MHz,CDCl3)δ7.40–7.25(m,5H),6.55(d,J=16.0Hz,1H),6.16(dt,J=16.0,7.2Hz,1H),5.93(s,1H),5.82(s,1H),3.16(d,J=6.8,2H);13C NMR(100MHz,CDCl3)δ136.9,134.4,131.0,128.9,128.0,126.7,123.4,121.9,118.7,37.9。
本实施例的反应式如下:
以上所述之实施例,仅仅用以解释本发明,并非限制本发明实施范围,对于本技术领域的技术人员来说,当然可根据本说明书中所公开的技术内容,通过置换或改变的方式轻易做出其它的实施方式,故凡在本发明的原理及工艺条件所做的变化和改进等,均应包括于本发明申请专利范围内。

Claims (10)

1.一种α-烯丙基取代的α,β-不饱和酮、酯或腈化合物的合成方法,其特征在于,以烯丙基醇与磷叶立德为反应底物,在烯丙基氯化钯(II)二聚体和双膦配体催化体系作用下,一锅法烯丙化-Wittig反应制备α-烯丙基取代的α,β-不饱和酮、酯或腈化合物。
2.根据权利要求1所述的合成方法,其特征在于,所述烯丙基氯化钯(II)二聚体的用量为0.5~10mol%。
3.根据权利要求1所述的合成方法,其特征在于,所述烯丙基氯化钯(II)二聚体的用量为1~2.5mol%。
4.根据权利要求1所述的合成方法,其特征在于,所述双膦配体为1,2-双(二苯膦)乙烷、1,4-双(二苯膦)丁烷、1,5-双(二苯膦)戊烷或1,1'-双(二苯基膦)二茂铁,双膦配体的用量为2~40mol%。
5.根据权利要求1所述的合成方法,其特征在于,所述双膦配体为1,1'-双(二苯基膦)二茂铁,其用量为4~10mol%。
6.根据权利要求1所述的合成方法,其特征在于,具体步骤如下:
将烯丙基醇、磷叶立德、烯丙基氯化钯(II)二聚体和双膦配体加到反应溶剂中,在氮气气氛中于20~100℃条件下搅拌进行烯丙化反应6~24小时,然后加入甲醛溶液,室温下搅拌进行Wittig反应6~12小时,得α-烯丙基取代的α,β-不饱和酮、酯或腈化合物,
反应式为:
其中:
R1是-H、苯基、杂芳基或烷基;
R2是-H、烷基或苯基;
R3是-H、烷基或苯基;
R4是酮基、酯基或氰基;
所述反应溶剂为醇、水或醇的水溶液。
7.根据权利要求6所述的合成方法,其特征在于,所述反应溶剂为甲醇、乙醇或水。
8.根据权利要求6所述的合成方法,其特征在于,Wittig反应在氮气或空气下进行。
9.根据权利要求6所述的合成方法,其特征在于,烯丙化反应的反应温度为30~60℃,反应时间为6~12小时。
10.根据权利要求6所述的合成方法,其特征在于,所述甲醛溶液为37%甲醛水溶液。
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