Solid-phase synthesis of skeletally diverse benzofused sultams via palladium-catalyzed cyclization
摘要:
The solid-phase synthesis of sultams from resin-bound amino acids is described. The sulfonylation of the resin-bound primary amines afforded the requisite secondary amines, after which the intramolecular Buchwald-Hartwig-type coupling forms the C-S bond. A final alkylation on the sulfonamides followed by cleavage provided the corresponding seven-membered sultams. (c) 2011 Elsevier Ltd. All rights reserved.
Solid-phase synthesis of skeletally diverse benzofused sultams via palladium-catalyzed cyclization
摘要:
The solid-phase synthesis of sultams from resin-bound amino acids is described. The sulfonylation of the resin-bound primary amines afforded the requisite secondary amines, after which the intramolecular Buchwald-Hartwig-type coupling forms the C-S bond. A final alkylation on the sulfonamides followed by cleavage provided the corresponding seven-membered sultams. (c) 2011 Elsevier Ltd. All rights reserved.
An efficient synthesis of β-acylureas via a three-component, one-pot synthesis using TCS/ZnCl2
作者:Tamer K. Khatab、Khairy A.M. El-Bayouki、Wahid M. Basyouni
DOI:10.1016/j.tetlet.2011.01.066
日期:2011.3
A simple and efficientone-pot, three-component synthesis of new trisubstituted ureas containing diastereotopic protons is achieved via the reaction of aromatic aldehydes, aromatic ketones, and dimethyl cyanamide using a TCS/ZnCl2 reagent mixture at room temperature.
Solid-phase synthesis of skeletally diverse benzofused sultams via palladium-catalyzed cyclization
作者:Wenteng Chen、Zhi Li、Lili Ou、Marc A. Giulianott、Richard A. Houghten、Yongping Yu
DOI:10.1016/j.tetlet.2011.01.055
日期:2011.3
The solid-phase synthesis of sultams from resin-bound amino acids is described. The sulfonylation of the resin-bound primary amines afforded the requisite secondary amines, after which the intramolecular Buchwald-Hartwig-type coupling forms the C-S bond. A final alkylation on the sulfonamides followed by cleavage provided the corresponding seven-membered sultams. (c) 2011 Elsevier Ltd. All rights reserved.