An internal oxidant-directing strategy enabling transition metal-free C–S bond ligation
摘要:
Organic sulfur compounds have broad applications in biology, medicine and material sciences and intensive efforts have been devoted to developing mild and general C-S bond-forming methods. However, a mild, transition-metal-free, direct C-H bond functionalization method remains elusive. Here, we report the use of an internal oxidant-directing strategy to achieve this goal. The cascade reactions described here show excellent chemoselectivity and a wide substrate scope for both oxyamines and sulfenylation reagents. This study enlarges the synthesis toolbox for preparing structurally diverse sulfilimines under mild conditions. (C) 2019 Elsevier Ltd. All rights reserved.
[4 + 1] Cycloaddition Reactions of<i>o</i>-Thioquinones with Isocyanides: Novel Syntheses of 2-Imino-1,3-Oxathioles
作者:Vijay Nair、Bini Mathew、A. U. Vinod、Joseph Swaroop Mathen、Sindu Ros、Rajeev S. Menon、R. Luxmi Varma、R. Srinivas
DOI:10.1055/s-2003-38072
日期:——
o-Thioquinones, generated in situ from o-hydroxyphenylthiophthalimides, underwent facile [4 + 1] cycloaddition reactions with isocyanides to afford 2-imino-1,3-oxathioles.
[4+2] Cycloadditions of o-Thioquinones with Alkynes and Arylalkenes: a Facile Synthesis of Benzoxathiins
作者:Vijay Nair、Bini Mathew
DOI:10.3987/com-01-s(k)6
日期:——
o-Thioquinones generated in situ from o-hydroxybenzothiophthalimides underwent facile [4+2] cycloaddition reaction with alkynes and alkenes to afford benzoxathiin derivatives.
[4+2] Cycloaddition reactions of o-thioquinones with pentafulvenes: efficient synthesis of benzoxathiins
作者:Vijay Nair、Bini Mathew、Rajeev S Menon、Saumini Mathew、M Vairamani、S Prabhakar
DOI:10.1016/s0040-4020(02)00263-6
日期:2002.4
o-Thioquinones undergo [4+2] cycloaddition reactions with pentafulvenes leading to 1,4-benzoxathiins. Reactions of 6-styrenylfulvene with o-thioquinones also afforded similar products. (C) 2002 Published by Elsevier Science Ltd.