Pyrrolizidinone and indolizidinone synthesis: generation and intramolecular addition of .alpha.-acylamino radicals to olefins and allenes
作者:Duane A. Burnett、Joong Kwon Choi、David J. Hart、Yeun Min Tsai
DOI:10.1021/ja00338a033
日期:1984.12
Des radicaux α-acylamino peuvent etre generes par traitement de derives de phenylthio-2-, phenylseleno-2 ou methylthio-2 butene-3'yl-1 pyrrolidones-2 par l'hydrure de tributyl-Sn en presence de AIBN. Ces radicaux subissent des reactions intramoleculaires pour donner des indolizidinones et des pyrrolizidinones
Des radicaux α-acylamino peuvent etregeneres par traitement de 衍生 de phenylthio-2-, phenylseleno-2 oumethylthio-2 butene-3'yl-1 pyrrolidones-2 par l'hydrure de tributyl-Sn en Ces radicaux subissent des反应分子内反应donner des indolizidinones et des pyrrolizidinones
Di-μ-hydroxy-bis(N,N,N′,N′-tetramethylenediamine)-copper(II) chloride [Cu(OH)·TMEDA]2Cl2: an efficient, practical catalyst for benzylation and allylation of amides
An efficient protocol for the benzylation or allylation of amides using the corresponding benzyl or allyl chlorides as electrophiles under basic conditions with commercially available 5 mol % of [Cu(OH)TMEDA]2Cl2 as catalyst was developed. Under these conditions, unprotected amino acids were benzylated without any racemization.
[EN] METHOD FOR CONVERSION OF DIAMMONIM SUCCINATE IN FERMENTATION BROTH TO 2-PYRROLIDONE AND N-METHYLPYRROLIDONE<br/>[FR] PROCÉDÉ DE CONVERSION DU SUCCINATE DE DIAMMONIUM PRÉSENT DANS UN BOUILLON DE FERMENTATION EN 2-PYRROLIDONE ET EN N-MÉTHYLPYRROLIDONE
申请人:MYRIANT CORP
公开号:WO2013033649A1
公开(公告)日:2013-03-07
This invention relates to a process for preparing 2-pyrroiidone (also called 2- pyrrolidinone) and N-methylpyrrolidone (also called N-methylpyrrolidinone) from diammonium succinate in fermentation broth. In the first stage of this invention, renewable carbon resources are utilized to produce diammonium succinate through biological fermentation. In the second stage of this present invention, diammonium succinate is converted into 2-pyrroiidone and N-methylpyrrolidone through a two step reaction. Both the steps of the reaction leading to the production of 2-pyrroiidone and N-methylpyrrolidone are carried out in a solvent phase to prevent the loss of succinimide through hydrolysis.
这项发明涉及一种从发酵液中的丙二酸二铵制备2-吡咯酮(也称为2-吡咯啉酮)和N-甲基吡咯酮(
A Practical Ruthenium-Catalyzed Cleavage of the Allyl Protecting Group in Amides, Lactams, Imides, and Congeners
作者:Benito Alcaide、Pedro Almendros、Jose M. Alonso
DOI:10.1002/chem.200501227
日期:2006.3.20
deprotection of N-allylic amide-like moieties was developed. The first examples accounting for the ruthenium-catalyzed deallylation of amides, lactams, imides, pyrazolidones, hydantoins, and oxazolidinones have been achieved by the sequential use of Grubbs carbene (isomerization step) and RuCl(3) (oxidation step). A variety of substrates, including enantiopure multifunctional beta- and gamma-lactams, can
Preparation of γ-siloxyallyltributylstannanes and their use in the synthesis of (±)-1-deoxy-6,8a-di-epi-castanospermine
作者:Floris Chevallier、Erwan Le Grognec、Isabelle Beaudet、Florian Fliegel、Michel Evain、Jean-Paul Quintard
DOI:10.1039/b409507c
日期:——
gamma-siloxyallyltributylstannanes were selectively obtained as E or Z isomers from beta-tributylstannylacrolein upon reaction with lithium or magnesium alkylcyanocuprates. The ability of the reagents to give a high syn selectivity when added to iminium salts has been used for the efficient synthesis of (+/-)-1-deoxy-6,8a-di-epi-castanospermine from succinimide. The key step of the synthesis was the