2-Aza-4-(alkoxycarbonyl)spiro[4,5]-decan-3-one and a process for the production of it, starting either from cyclohexylidene malonic acid esters or cyclohexylidene cyanoalkylates. The cyclohexylidene malonic acid ester is reacted with hydrocyanic acid in the presence of a catalytic amount of alkali cyanide or with a stoichiometric amount of alkali cyanide, in an alcohol, and subsequently treated with an acid. The resultant (1-cyanocyclohexyl) malonic acid dialkyl ester is converted by catalytic hydrogenation into the product. The cyclohexylidene cyanoalkylate is reacted with a stoichiometric amount of alkali cyanide, in an alcohol or with hydrocyanic acid in the presence of a catalytic amount of an alkali cyanide. The resultant (1-cyanocyclohexyl)-cyanoacetic acid alkyl ester is reacted in an alcohol in an acid to provide (1-cyanocyclohexyl) malonic acid dialkyl ester. The later ester is converted by catalytic hydrogenation into the product. Process of using the product for the production of 1-(aminomethyl)cyclohexane acetic acid by converting the product with HCl or sulfuric acid at an elevated temperature.
A novel olefination of diazo-compounds with carbonyl compounds mediated by tributylstibine and catalytic amount of Cu(I)I
作者:Yi Liao、Yao-Zeng Huang
DOI:10.1016/s0040-4039(00)97988-7
日期:1990.1
A one-pot reaction of tributylstibine, diazo-compounds including dimethyldiazomalonate, ethyl diazoacetate and diazoacetylacetone, carbonyl compounds and catalytic amount of Cu(I)I resulted in olefination in high yields.
The present invention relates to new α,β-unsaturated esters of formula I. The new compounds exhibit an intense, very long lasting fruity-pineapple odor with green galbanum-type undertones.
Enantioselective γ-Alkylation of α,β-Unsaturated Malonates and Ketoesters by a Sequential Ir-Catalyzed Asymmetric Allylic Alkylation/Cope Rearrangement
作者:Wen-Bo Liu、Noriko Okamoto、Eric J. Alexy、Allen Y. Hong、Kristy Tran、Brian M. Stoltz
DOI:10.1021/jacs.6b02153
日期:2016.4.27
A catalytic, enantioselective γ-alkylation of α,β-unsaturated malonates and ketoesters is reported. This strategy entails a highly regio- and enantioselective iridium-catalyzed α-alkylation of an extended enolate, and a subsequent translocation of chirality to the γ-position via a Cope rearrangement.
Reactions of diazocompounds with carbonyl compounds mediated by diorganyl telluride and catalytic amount of CuI compounds: conversion of aldehydes to a
作者:Zhang-Lin Zhou、Yao-Zeng Huang、Li-Lan Shi
DOI:10.1016/s0040-4020(01)80425-7
日期:1993.7
A one-pot reaction of diorganyl telluride, diazo-compounds including dimethyl diazomalonate and ethyl diazoacetate, carbonylcompound and catalytic amount of Cu(I)I afforded the olefination products in high yields. The reaction is proposed to be through diorganyltelluronium bis(methoxycarbonyl)methylide and (ethoxycarbonyl)methylide respectively.