Synthesis 2019; 51(11): 2359-2370
DOI: 10.1055/s-0037-1610685
paper
© Georg Thieme Verlag Stuttgart · New York

Palladium-Catalyzed Decarboxylative [4+2] Cycloaddition of Vinyl Benzoxazinanones with Cyclic N-Sulfimines: Stereoselective Synthesis­ of Benzosulfamidate-Fused Tetrahydroquinazolines

Dasom Mun
,
Eunjin Kim
,
Sung-Gon Kim*
Department of Chemistry, Kyonggi University, 154-42 Gwanggyosan-ro, Yeongtong-gu, Suwon 16227, Republic of Korea   Email: sgkim123@kyonggi.ac.kr
› Author Affiliations
This research was supported by the Nanomaterial Technology Development Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (NRF-2012M3A7B4049645), and the Basic Science Research Program through the NRF funded by the Ministry of Education (NRF-2016R1D1A1A09916621).
Further Information

Publication History

Received: 21 November 2018

Accepted after revision: 28 December 2018

Publication Date:
20 February 2019 (online)


Abstract

Methods for the catalytic synthesis of highly functionalized benzosulfamidate-fused tetrahydroquinazolines are presented. The decarboxylative [4+2] cycloaddition of vinyl benzoxazinanones with benzoxathiazine 2,2-dioxides catalyzed by Pd(PPh3)4 affords fused-tetrahydroquinazolines with high diastereoselectivities. Alternatively, catalytic asymmetric [4+2] cycloaddition employing a chiral palladium-containing phosphoramidite ligand provides optically enriched benzosulfamidate-fused tetrahydroquinazolines in good yields and with excellent diastereoselectivities and enantioselectivities.

Supporting Information