Novel Synthesis of Aza-phthalimidine Hydroxylactams
摘要:
A novel and convenient synthetic route for preparing aza-phthalimidine ydroxylactams (5a-j) by N-bromosuccinimide (NBS) was developed. This method involved the substitution reactions of substrates (3a-j) with NBS via unstable intermediate bromides (4a-j) rapidly hydrolyzed into hydroxyl products in the course of the workup process.
hydroxide‐catalyzed hydrosilylation exhibits excellent activity and chemoselectivity for the reduction of cyclic imides under mild reaction conditions. The chemoselectivity of the reduction system may be readily tuned by changing the identity and stoichiometry of the hydrosilanes: a polymethylhydrosiloxane (PMHS)/potassium hydroxide reduction system resulted in the reduction of various cyclic imides to
Site-Selective Carbonylative Synthesis of Structurally Diverse Lactams from Heterocyclic Amines with TFBen as the CO Source
作者:Jun Ying、Qian Gao、Xiao-Feng Wu
DOI:10.1021/acs.joc.9b02114
日期:2019.11.1
A palladium-catalyzed site-selectiveC-Hcarbonylation of heterocyclic amines for the synthesis of lactam motifs has been developed. The reaction of 3-thiophene methylamines, 2-thiophene methylamines, and tryptamines with benzene-1,3,5-triyl triformate (TFBen) as the CO source provides a series of structurally diverse lactams in moderate to high yields with excellent regioselectivities.