ES8401469A1 - Procedimiento para la obtencion de esteres de acido piridincarboxilico. - Google Patents
Procedimiento para la obtencion de esteres de acido piridincarboxilico.Info
- Publication number
- ES8401469A1 ES8401469A1 ES520528A ES520528A ES8401469A1 ES 8401469 A1 ES8401469 A1 ES 8401469A1 ES 520528 A ES520528 A ES 520528A ES 520528 A ES520528 A ES 520528A ES 8401469 A1 ES8401469 A1 ES 8401469A1
- Authority
- ES
- Spain
- Prior art keywords
- connecting element
- holder
- components
- detachable connection
- plugged together
- 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.)
- Expired
Links
- 238000005553 drilling Methods 0.000 abstract 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
- F16B21/10—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts
- F16B21/16—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with grooves or notches in the pin or shaft
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/046—Couplings; joints between rod or the like and bit or between rod and rod or the like with ribs, pins, or jaws, and complementary grooves or the like, e.g. bayonet catches
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
- F16B21/06—Releasable fastening devices with snap-action
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
- F16B21/10—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts
- F16B21/12—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings by separate parts with locking-pins or split-pins thrust into holes
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
- Earth Drilling (AREA)
Abstract
PROCEDIMIENTO PARA LA OBTENCION DE ESTERES DE ACIDO PIRIDINCARBOXILICO.CONSISTE EN LAS REACCIONES DE: A) DERIVADOS DE 1,4-DIHIDROPIRIDINA DE FORMULA (II) CON AGENTES OXIDANTES EN PRESENCIA DE DISOLVENTES INERTES A TEMPERATURAS ENTRE 0 Y 200JC; B) ACIDOS DE FORMULA (III) SE ESTERIFICAN A ESTERES DEL ACIDO CARBOXILICO DE FORMULA (I); O C) SI R1 Y/O R2 EN (I) SON UN GRUPO HIDROXIALQUILO, LAS CORRESPONDIENTES MONO- O BIS-ACETOXIALQUIL-PIRIDINA SE SOMETEN A LAS CONDICIONES DE UNA HIDROLISIS BENIGNA Y SELECTIVA; O D) SI X EN (I) ES CARBOXILO Y R1 ES HIDROXIALQUILO,COMPUESTOS (IV) SE SAPONIFICAN EN PRESENCIA DE ALCALIS COMPUESTOS (V); O E) SI R1 FORMA CON X EN (I) UN ANILLO LACTONA, ACIDOS (V), BAJO LA INFLUENCIA DE PROTONES SE CICLIZAN A COMPUESTOS (VI). EL RADICAL R ES UN RESTO ARILO O TIENILO, FURILO, PIRRILO Y OTROS; R1 ES HIDROGENO, UN RESTO ALQUILO O ARILO, UN GRUPO ACILOXIALQUILO Y OTROS; R2 ES HIDROGENO, UN RESTO ALQUILO, ARILO O UN GRUPO ACILOXIALQUILO; X ES UN GRUPO NITRILO Y OTROS; R5 ES UN RESTO HIDROCARBURO SATURADO.O INSATURADO; Y N UN NUMERO DE 1 A 4.DE USO FARMACOLOGICO EN ENFERMEDADES BASADAS EN UNA ISQUEMIAY/O HIPOXIA.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19823209284 DE3209284A1 (de) | 1982-03-13 | 1982-03-13 | Vorrichtung zur loesbaren verbindung zweier zusammengesteckter bauteile |
Publications (2)
Publication Number | Publication Date |
---|---|
ES8401469A1 true ES8401469A1 (es) | 1983-12-16 |
ES520528A0 ES520528A0 (es) | 1983-12-16 |
Family
ID=6158240
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES520528A Granted ES520528A0 (es) | 1982-03-13 | 1983-03-11 | Procedimiento para la obtencion de esteres de acido piridincarboxilico. |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE3209284A1 (es) |
ES (1) | ES520528A0 (es) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2727168B1 (fr) * | 1994-11-17 | 1997-01-10 | Burdet Jean L Sa | Dispositif d'immobilisation d'un axe dans un alesage |
US6086018A (en) * | 1997-12-09 | 2000-07-11 | Mcdonnell Douglas Corporation | Interlocking assembly system for an aircraft cabin |
US5941126A (en) * | 1998-03-12 | 1999-08-24 | Eaton Corporation | Shift fork assembly |
BE1020771A3 (nl) * | 2012-06-29 | 2014-04-01 | Versus Invest | Loopwagen voor een schuifdak van een trailer of vrachtwagen. |
CN102852937B (zh) * | 2012-09-11 | 2014-06-18 | 中国核电工程有限公司 | 一种可供机械手操作的快速连接装置 |
WO2015017971A1 (zh) * | 2013-08-06 | 2015-02-12 | 吉瑞高新科技股份有限公司 | 电子烟 |
CN103742500B (zh) * | 2013-12-26 | 2016-08-17 | 北京市三一重机有限公司 | 销轴组件和桩工机械 |
US10943802B2 (en) * | 2018-07-31 | 2021-03-09 | Taiwan Semiconductor Manufacturing Co., Ltd. | Photoresist bottle container |
-
1982
- 1982-03-13 DE DE19823209284 patent/DE3209284A1/de not_active Withdrawn
-
1983
- 1983-03-11 ES ES520528A patent/ES520528A0/es active Granted
Also Published As
Publication number | Publication date |
---|---|
DE3209284A1 (de) | 1983-09-15 |
ES520528A0 (es) | 1983-12-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FD1A | Patent lapsed |
Effective date: 19960603 |