1,2-Migration in Rhodium(II) Carbene Transfer Reaction: Remarkable Steric Effect on Migratory Aptitude
作者:Fengping Xiao、Jianbo Wang
DOI:10.1021/jo0605391
日期:2006.7.1
been prepared in order to investigate the stericeffect in 1,2-migration reaction of rhodium(II) carbene. Through the investigation on the diazo decomposition of these compounds with Rh2(OAc)4, it was found that the stericeffect could dramatically influence the migratory aptitude. In many cases, the stericeffect could override the inherent electronic effect of the substituent.
Carboxylate Catalysis: A Catalytic <i>O</i>-Silylative Aldol Reaction of Aldehydes and Ethyl Diazoacetate
作者:Saara Riuttamäki、Anton Bannykh、Petri M. Pihko
DOI:10.1021/acs.joc.3c01304
日期:2023.10.20
A mild catalytic variant of the aldol reaction between ethyldiazoacetate and aldehydes is described using a combination of N,O-bis(trimethylsilyl)acetamide and catalytic tetramethylammonium pivalate as catalyst. The reaction proceeds rapidly at ambient temperature to afford the O-silylated aldol products in good to excellent yield, and the acetamide byproducts can be removed by simple filtration.