Ring opening of 2-(bromomethyl)-1-sulfonylaziridines towards 1,3-heteroatom substituted 2-aminopropane derivatives
摘要:
1,3-Heteroatom substituted 2-aminopropane derivatives have been prepared from 2-(bromomethyl)-1-sulfonylaziridines for the first time using sodium azide or different potassium phenoxides in water in the presence of silica gel. The applicability of 1-arenesulfonyl-2(bromomethyl)aziridines for the synthesis of functionalized sulfonamides has also been demonstrated towards different 1,3-dialkoxy-2(tosylamino)propanes and 1,3-dialkylthio-2-(tosylamino)propanes upon treatment with the appropriate sodium alkoxide or sodium alkylthiolate in the corresponding alcohol or in methanol, respectively. (c) 2005 Elsevier Ltd. All rights reserved.
Reported is a modular one‐step three‐component synthesis of tetrahydroisoquinolines using a Catellanistrategy. This process exploits aziridines as the alkylating reagents, through palladium/norbornene cooperative catalysis, to enable a Catellani/Heck/aza‐Michael addition cascade. This mild, chemoselective, and scalable protocol has broad substrate scope (43 examples, up to 90 % yield). The most striking
The scope and limitations of the organolithium-mediated conversion of (3-methoxy N-tosyl aziridines derived from acyclic allylic alcohols into substituted allylic sulfonamides are described.
A Modular Approach for Diversity‐Oriented Synthesis of 1,3‐
<i>trans</i>
‐Disubstituted Tetrahydroisoquinolines: Seven‐Step Asymmetric Synthesis of Michellamines B and C
reaction and a gold(I)-catalyzed cyclization/reduction cascade has been established for the diversity-oriented synthesis of 1,3-trans-disubstituted tetrahydroisoquinolines. This synthetic strategy enabled concise syntheses of an analogue of the new drug mevidalen as well as four naphthylisoquinoline alkaloids.