Efficient access to sp3-rich tricyclic amine scaffolds through Diels–Alder reactions of azide-containing silyloxydienes
摘要:
The preparation of sp(3)-rich scaffolds to obtain more natural product-like libraries for incorporation into screening decks is challenging. Here, we describe the use of a Diels-Alder reaction between an enone and an azide-containing silyloxydiene to gain efficient access to complex tricyclic amine scaffolds. Derivatization of these scaffolds provided a library of 80 amines, amides, sulfonamides, quinolines and indolenines, all in >20 mg quantities and >90% purities. These library compounds displayed properties more similar to alkaloid natural products than to drugs and commercial drug-like libraries, as shown by a high proportion of sp(3) carbon centers. (C) 2016 Elsevier Ltd. All rights reserved.
One-Pot Synthesis of Lactams Using Domino Reactions: Combination of Schmidt Reaction with Sakurai and Aldol Reactions
作者:Chan Woo Huh、Gagandeep K. Somal、Christopher E. Katz、Huaxing Pei、Yibin Zeng、Justin T. Douglas、Jeffrey Aubé
DOI:10.1021/jo901843w
日期:2009.10.16
A series of domino reactions in which the intramolecular Schmidtreaction is combined with either a Sakurai reaction, an aldol reaction, or both is reported. The Sakurai reaction of an allylsilane with an azido-containing enone under Lewis acidic conditions followed by protonation of the resulting titanium enolate species allowed for a subsequent intramolecular Schmidtreaction. Alternatively, the