JPS5540637A - Preparation of chromene - Google Patents

Preparation of chromene

Info

Publication number
JPS5540637A
JPS5540637A JP11407578A JP11407578A JPS5540637A JP S5540637 A JPS5540637 A JP S5540637A JP 11407578 A JP11407578 A JP 11407578A JP 11407578 A JP11407578 A JP 11407578A JP S5540637 A JPS5540637 A JP S5540637A
Authority
JP
Japan
Prior art keywords
alkoxy
alkylchromene
alkoxyphenol
reacting
prepared
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11407578A
Other languages
Japanese (ja)
Inventor
Noriyuki Hirowatari
Toru Yamanaka
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsui Petrochemical Industries Ltd
Original Assignee
Mitsui Petrochemical Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsui Petrochemical Industries Ltd filed Critical Mitsui Petrochemical Industries Ltd
Priority to JP11407578A priority Critical patent/JPS5540637A/en
Publication of JPS5540637A publication Critical patent/JPS5540637A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To prepare an alkoxy-2-alkylchromene useful as an insecticide, in high yield and at a low cost, by the dehydrogenation of alkoxy-2-alkylcuromane prepared by reacting an alkoxyphenol with a conjugated diene.
CONSTITUTION: An alkoxy-2-alkylchromene of formula III (R1,2 are alkoxy or H, provided that at least one of R1 and R2 is alkoxy; R3 is alkyl; R4 is H or hydrocarbon), is prepared without using a complicated process or special reaction reagent, by reacting an alkoxyphenol I with a conjugated diene in the presence of an acid catalyst such as sulfuric acid, and dehydrogenating the resulting alkoxy-2-chromane II with a dehydrogenating agent such as dichlorodicyanobenzoquinone. 7-Methoxy- 2, 2-dimethylchromene, etc. have antagonistic activity against juvenile hormone of insects such as Hemiptera, etc., and are expected as effective insecticides.
COPYRIGHT: (C)1980,JPO&Japio
JP11407578A 1978-09-19 1978-09-19 Preparation of chromene Pending JPS5540637A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11407578A JPS5540637A (en) 1978-09-19 1978-09-19 Preparation of chromene

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11407578A JPS5540637A (en) 1978-09-19 1978-09-19 Preparation of chromene

Publications (1)

Publication Number Publication Date
JPS5540637A true JPS5540637A (en) 1980-03-22

Family

ID=14628411

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11407578A Pending JPS5540637A (en) 1978-09-19 1978-09-19 Preparation of chromene

Country Status (1)

Country Link
JP (1) JPS5540637A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4677537A (en) * 1984-09-20 1987-06-30 Mitsubishi Denki Kabushiki Kaisha Converter device
US4716238A (en) * 1983-02-15 1987-12-29 Alkaloida Vegyeszeti Gyar Chromene derivatives useful as insecticides
US4866089A (en) * 1983-02-16 1989-09-12 Alkaloida Vegyeszeti Gyar Chromene derivatives and pesticidal composition comprising the same
WO1996009298A1 (en) * 1994-09-20 1996-03-28 Industrie Chimiche Caffaro S.P.A. Method for preparing coumarin and derivatives thereof
CN102887882A (en) * 2012-10-15 2013-01-23 柳忠全 Synthesis method of precocene and analogs thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4716238A (en) * 1983-02-15 1987-12-29 Alkaloida Vegyeszeti Gyar Chromene derivatives useful as insecticides
US4866089A (en) * 1983-02-16 1989-09-12 Alkaloida Vegyeszeti Gyar Chromene derivatives and pesticidal composition comprising the same
US4677537A (en) * 1984-09-20 1987-06-30 Mitsubishi Denki Kabushiki Kaisha Converter device
WO1996009298A1 (en) * 1994-09-20 1996-03-28 Industrie Chimiche Caffaro S.P.A. Method for preparing coumarin and derivatives thereof
CN102887882A (en) * 2012-10-15 2013-01-23 柳忠全 Synthesis method of precocene and analogs thereof

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