Synthesis of 9-oxiranyl-9H-purine derivatives in β-cyclodextrin cavity
摘要:
An efficient and mild method has been developed for the preparation of 9-oxiranyl-9H-purine derivatives. This reaction proceeds smoothly in beta-cyclodextrin cavity at room temperature, giving good to excellent yields. (C) 2014 Elsevier Ltd. All rights reserved.
C8-Alkyl-substituted purine analogues were synthesized through direct alkylation of 8-H purine with tetrahydrofuran in the presence of Co catalyst in one step. The reactions gave a series of novel C8-oxygen heterocyclic alkyl purine compounds in good yields under mild reaction conditions by the readily available alkylating reagents, providing a complementary route to the classical coupling reactions
Synergistic Organoboron/Palladium Catalysis for Regioselective N-Allylations of Azoles with Allylic Alcohols
作者:Matthew T. Zambri、Teh Ren Hou、Mark S. Taylor
DOI:10.1021/acs.orglett.2c03084
日期:2022.10.21
A method for regioselective palladium-catalyzed allylic alkylation of ambident nitrogen heterocycles, employing simple allylicalcohols as electrophile precursors, is described. An organoboron co-catalyst serves both to activate the azole-type nucleophile toward selective N-functionalization and to accelerate the formation of a π-allylpalladium complex from the allylicalcohol. The method can be applied
描述了一种使用简单的烯丙醇作为亲电体前体的区域选择性钯催化烯丙基烷基化环氮杂环的方法。有机硼助催化剂既可以激活唑类亲核试剂以实现选择性 N 官能化,又可以加速烯丙醇形成 π-烯丙基钯络合物。该方法可以应用于各种杂环类型,包括 1,2,3-和 1,2,4-三唑、四唑、吡唑和嘌呤,并且可以扩展到取代的烯丙醇伙伴。