Phosphonium Ion-Tethered Secondary Amines for Chemospecific 5-<i>Enolexo</i> Aldol Condensations of 6-Ketoaldehydes
作者:Akash Sugunan、V. M. Aparna、Goreti Rajendar
DOI:10.1021/acs.joc.3c02285
日期:2023.12.15
targets five-membered carbo- and heterocyclic aldehydes, involving unusual aldehydes as donors and ketones as acceptors. Especially, enolizable aryl keto aldehydes and heteroatom-embedded ketoaldehydes exclusively produced cyclized products with our new catalyst, while other catalysts provided predominantly self-aldol or decomposedproducts. The scope and diversity of the method demonstrated by synthesizing
Vogel, Claus; Schnippenkoetter, Bernd; Jones, Peter G., Angewandte Chemie, 1993, vol. 105, # 7, p. 1116 - 1117
作者:Vogel, Claus、Schnippenkoetter, Bernd、Jones, Peter G.、Bubenitschek, Peter
DOI:——
日期:——
Direct Synthesis of Nitriles from Aldehydes Using an <i>O</i>-Benzoyl Hydroxylamine (BHA) as the Nitrogen Source
作者:Xiao-De An、Shouyun Yu
DOI:10.1021/acs.orglett.5b02547
日期:2015.10.16
The direct synthesis of nitriles from commercially available or easily prepared aldehydes has been achieved. O-(4-CF3-benzoyl)-hydroxylamine (CF3-BHA) was utilized as the nitrogen source to generate O-acyl oximes in situ with aldehydes, which can be converted to a nitrile with the assistance of a Bronsted acid. Several aliphatic, aromatic, and alpha,beta-unsaturated nitriles that contain different functional groups were prepared in high yields (up to 94% yield). This method has notable advantages, such as simple and mild conditions, high yields, and good functional group tolerance.