Application of Bis(trimethylsilyl) Phosphonite in the Efficient Preparation of New Heterocyclic α-Aminomethyl-H-phosphinic Acids
作者:Tomasz Olszewski、Bogdan Boduszek
DOI:10.1055/s-0030-1258387
日期:2011.2
efficient preparation of new heterocyclic α-aminomethyl-H-phosphinic acids is reported. The synthetic protocol is based on the application of bis(trimethylsilyl) phosphonite, as an efficient phosphorous nucleophile, in the reaction with the corresponding heterocyclic imines. Subsequent methanolysis of the addition intermediates leads to the expected heterocyclic α-aminomethyl-H-phosphinic acids in fair
Methyl-triflate-mediated dearylmethylation of <i>N</i>-(arylmethyl)carboxamides <i>via</i> the retro-Mannich reaction induced by electrophilic dearomatization/rearomatization in an aqueous medium at room temperature
Dearylmethylation of N-(arylmethyl)carboxamides was achieved under metal-free conditions in an aqueous medium induced by electrophilic dearomatization/rearomatization.
在无金属条件下,在水介质中通过亲电脱芳香化/重芳香化实现了N-(芳甲基)羧酰胺的去芳甲基化。
Microwave accelerated Castagnoli-Cushman reaction: Synthesis of novel 6,7,8,9-tetrahydropyrido[3′,2′:4,5]pyrrolo[1,2-a]pyrazines
作者:Devaiah Vytla、Parinita Shaw、Rajeswari Velayuthaperumal、Jithendra Emmadi、Arvind Mathur、Amrita Roy
DOI:10.1016/j.tetlet.2021.152943
日期:2021.3
acetic anhydride as a dehydrating agent was significantly accelerated by microwave irradiation. The reaction conditions offer a convenient preparation of novel 6,7,8,9-tetrahydropyrido[3′,2′:4,5]pyrrolo[1,2-a]pyrazines in moderate to good yields with good trans stereoselectivity.
使用乙酸酐作为脱水剂,各种氮杂吲哚二羧酸与亚胺的Castagnoli-Cushman反应可通过微波辐射显着加速。反应条件提供了方便的制备新型6,7,8,9-四氢吡啶并[3',2':4,5]吡咯并[1,2- a ]吡嗪的良好收率和良好的反式立体选择性。