专利号:US-3978100-A 优先权日:1973-04-18 标题:Allenic esters, process for preparation thereof and process for rearrangement thereof 发明人:FUJITA YOSHIJI; OMURA YOSHIAKI; HISHIDA TAKASHI; ITOI KAZUO 权利人:KURARAY CO 摘要:Allenic esters of the formula: ##EQU1## (specific examples of R, R 1 , R 2 , R 3 and R 4 are given) and a process for the preparation thereof which comprises reacting propargyl alcohol derivatives with 2-substituted ortho-acetic acid esters in the presence of an acidic catalyst. These allenic esters are rearranged in the presence of an alkali catalyst to form α, β, γ, δ-unsaturated carboxylic acid esters and are useful as intermediates in the synthesis of various perfumes, medicines, agricultural chemicals and the like.
专利号:US-3830812-A 优先权日:1972-07-10 标 题 :Herbicidal and growth-regulant compositions based on novel pyrimido(4,5-d)pyrimidinones 发明人:RAMSEY A 权利人:FMC CORP 摘要:A CLASS OF HERBICIDAL COMPOUNDS CONSISTING OF 2,5-DIALKYL- AND 2,5,7-TRIALKYLPYRIMIDO(4,5-D) ONES EXHIBITS PRE-EMERGENCE AND POST-EMERGENCE HERBICIDAL ACITVITY. THE SYNTHESIS OF MEMBERS OF THIS CLASS IS DESCRIBED IN DETAIL AND THE UTILITY OF REPRESENTATIVE CMPOUNDS IS EXEMPLIFIED.
专利号:RU-2136675-C1 优先权日:1993-09-22 标 题 :Derivatives of 3-(5-tetrazolylbenzyl)-aminopiperidine, methods of their synthesis and pharmaceutical composition on said