1-(1-Alkenyl)benzotriazoles: Novel α-Hydroxyacyl Anion Equivalents for the Synthesis of α-Hydroxy Ketones
摘要:
alpha-lithiated 1-(1-alkenyl)benzotriazoles, generated from the reactions of 1-(1-alkenyl)benzotriazoles with n-BuLi, react with a variety of electrophiles to afford alpha-substituted 1-(1-alkenyl)benzotriazoles which undergo epoxidation with m-CPBA followed by hydrolysis to give alpha-hydroxy ketones in good yields. Thus, 1-(1-alkenyl)benzotriazoles behave as alpha-hydroxyacyl anion equivalents.
Double bond migration in N-allylindoles has been investigated as a method to access N-vinyl derivatives of this heterocycle. The optimal reaction conditions employed t-BuOK or NaH in DMSO as the solvent at room temperature to afford the products in yields ranging from 51 to 99%. Although in some cases a high degree of stereoselectivity was observed, preferential formation of either the Z- or E-isomer was not predictable. The developed methodology was employed in the synthesis of (+/-)-debromoarborescidine B. (C) 2013 Elsevier Ltd. All rights reserved.
Palladium-Catalyzed Reaction of <i>N-</i>Allylbenzotriazoles with Amines: A Novel Method for the Preparation of Allylamines
作者:Alan R. Katritzky、Jiangchao Yao、Ming Qi
DOI:10.1021/jo980200h
日期:1998.7.1
MAERKY M.; SCHMID H.; HANSEN H.-J., HELV. CHIM. ACTA, 1979, 62, NO 7, 2129-2153
作者:MAERKY M.、 SCHMID H.、 HANSEN H.-J.
DOI:——
日期:——
Diez-Barra Enrique, de la Hoz Antonio, Loupy Andre, Sanchez-Migallon Ana, Heterocycles, 38 (1994) N 6, S 1367-1374
作者:Diez-Barra Enrique, de la Hoz Antonio, Loupy Andre, Sanchez-Migallon Ana