[go: up one dir, main page]

GB795173A - Process for the production of new ester compounds - Google Patents

Process for the production of new ester compounds

Info

Publication number
GB795173A
GB795173A GB27034/55A GB2703455A GB795173A GB 795173 A GB795173 A GB 795173A GB 27034/55 A GB27034/55 A GB 27034/55A GB 2703455 A GB2703455 A GB 2703455A GB 795173 A GB795173 A GB 795173A
Authority
GB
United Kingdom
Prior art keywords
malonic
neopentyl
sodium
give
alkyl
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
Application number
GB27034/55A
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.)
Pfizer Health AB
Original Assignee
Pharmacia AB
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 Pharmacia AB filed Critical Pharmacia AB
Publication of GB795173A publication Critical patent/GB795173A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07FACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F1/00Compounds containing elements of Groups 1 or 11 of the Periodic Table

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Esters of the formula R-CH2-CXZ-(CO)n-OR1 are prepared by condensing R-CH2-CH2X with R3O-(CO)n-OR1 in the presence of an alkali metal or a strongly basic alkali metal compound to give a compound in which Z is an alkali metal, and if desired, acidifying this to give Z=H, or condensing with an alkyl or alkenyl halide to give Z=alkyl or alkenyl; X is CN or COOR2, R is tertiary alkyl (preferably C4-C7) and R1-R3 are alkyl, preferably identical radicals (C1-C4) to avoid the production of a mixture of compounds. Suitable condensing agents are sodium, sodamide, sodium hydride and sodium alcoholate. When one of the reactants is a dialkyl carbonate the sodium alcoholate may be formed in situ by addition of metallic sodium. Examples show the preparation of the di-ethyl esters of the following acids: neopentyl-malonic, neopentyloxalacetic, methyl-neopentyl-malonic, ethylneopentyl - malonic, allyl - neopentyl - malonic, 2 - bromallyl - neopentyl - malonic, carbethoxymethyl - neopentyl - malonic, neopenylcyanoacetic (and sodium derivative), neopentylcyano - oxalacetic, b ,b - dimethylbutyl - malonic and b - methyl - b - ethylbutyl - allyl - malonic. The dimethyl ester of neopentyl-malonic acid is also prepared. The compounds (n=2) split off CO on heating to give the compounds (n=1).
GB27034/55A 1954-09-23 1955-09-22 Process for the production of new ester compounds Expired GB795173A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE795173X 1954-09-23

Publications (1)

Publication Number Publication Date
GB795173A true GB795173A (en) 1958-05-21

Family

ID=20339756

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27034/55A Expired GB795173A (en) 1954-09-23 1955-09-22 Process for the production of new ester compounds

Country Status (1)

Country Link
GB (1) GB795173A (en)

Similar Documents

Publication Publication Date Title
ES448454A1 (en) Method of preparing malonic acid dialkyl esters
GB795173A (en) Process for the production of new ester compounds
GB1388834A (en) Cyclic acetal derivatives and their use as herbicides
ES311043A1 (en) A procedure for preparing cinamic acid derivatives. (Machine-translation by Google Translate, not legally binding)
GB1342810A (en) Process for the preparation of cyclic ketones
GB1071818A (en) Novel indane derivatives and processes for their preparation
GB1107036A (en) Esters of dibenzocycloheptenyl-carboxylic acids
GB847779A (en) 2-(4-biphenylyl)-í¸-hexenoic acid esters thereof
GB820503A (en) Improvements in or relating to the production of n-substituted 2-hydroxymethyl pyrrolidines
GB837949A (en) Reserpic acid diesters and salts thereof and process for their manufacture
GB1079100A (en) Process for preparing cyclene-carboxylates
ES345183A1 (en) Glycyrrhetinic acid derivatives
GB837841A (en) Reserpic acid diesters and salts thereof and process for their manufacture
GB839313A (en) Reserpic acid diesters and salts thereof and process for their manufacture
GB923170A (en)
GB656864A (en) Preparation of amino alcohol esters of disubstituted malonic acids
GB637400A (en) Nitroolefine derivatives of malonic esters and process for preparing same
GB585833A (en) Alkamine esters of pyrrole-2, 4-dicarboxylic acids
GB1274543A (en) Aziridino-mitosenes
GB585834A (en) Alkamine esters of pyrrole substituted acrylic acids
GB837947A (en) Reserpic acid esters and salts thereof and process for their manufacture
GR14490B (en) METHOD OF PREPARATION OF PEPPERS.
GB913353A (en) Steroids
GB516542A (en) Manufacture of cyclopentanopolyhydrophenanthrene derivatives
GB738445A (en) Steroid alkali-metal enolates