Ti-<i>Crossed</i>-Claisen Condensation between Carboxylic Esters and Acid Chlorides or Acids: A Highly Selective and General Method for the Preparation of Various β-Keto Esters
condensation between a 1:1 mixture of carboxylic esters and acidchlorides promoted by TiCl4-Bu3N-N-methylimidazole proceeded successfully to give various beta-keto esters in good yields with excellent selectivities (19 examples, approximately 48-95% yield; cross/self-selectivity = approximately 96/4-99/1). The present method was extended to the condensation between a 1:1 mixture of carboxylicacids and carboxylic
Studies in Mixed Ester Condensations. II<sup>1</sup>
作者:E. Earl Royals、John C. Hoppe、A. D. Jordan、A. G. Robinson
DOI:10.1021/ja01156a120
日期:1951.12
[EN] BIOLOGICAL TISSUE-REINFORCING MATERIAL<br/>[FR] SUBSTANCE DE RENFORCEMENT DE TISSUS BIOLOGIQUES
申请人:GUNZE KK
公开号:WO2016169041A1
公开(公告)日:2016-10-27
Provided is a biological tissue-reinforcing material capable of more reliably reinforcing weakened tissue while preventing air leakage and fluid leakage without using fibrin glue, which is a blood product. Provided is a biological tissue-reinforcing material comprising a laminated structure, the laminated structure comprising: a fiber structure made of a bioabsorbable polymer; and a fiber structure made of etherified cellulose that is produced through etherification of hydroxyl groups of cellulose.