Buu-Hoi et al., Journal of the Chemical Society, 1957, p. 505,507
作者:Buu-Hoi et al.
DOI:——
日期:——
Direct Addition of Grignard Reagents to Aliphatic Carboxylic Acids Enabled by Bulky
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‐Organomagnesium Anilides
作者:Kilian Colas、A. Catarina V. D. dos Santos、Stefanie V. Kohlhepp、Abraham Mendoza
DOI:10.1002/chem.202104053
日期:2022.2.16
Adding the right amount: The addition of Grignard nucleophiles to carboxylic acids is made difficult by the lower nucleophilicity of these abundant organometallics, the low electrophilicity of carboxylate anions, and the faster over-addition to any ketones produced. Herein we introduce a simple magnesium anilide additive that enhances the nucleophilicity of Grignardreagents towards aliphatic carboxylates
Tf2O-Promoted Morgan–Walls Reaction: From a Flexible Approach to Functionalized Phenanthridines and Quinazolines to the Short and Divergent Total Syntheses of Alkaloids
作者:Pei-Qiang Huang、Xiao-Yu Su
DOI:10.1055/a-1957-4343
日期:2023.3
dehydrative cyclization reaction. More importantly, a one-pot method was established for the direct and divergent synthesis of four types of phenanthridinoids from o-xenylamines, which features both a tert-N-formyl-o-xenylamine and phenanthridinium salt as key and versatile intermediates. The investigation has resulted in one of the shortest and the most efficient total syntheses of the three natural products