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
› Institutsangaben
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).
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Publikationsverlauf

Received: 21. November 2018

Accepted after revision: 28. Dezember 2018

Publikationsdatum:
20. Februar 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