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Central zinc metal-controlled regioselective meso-bromination of zincated β-silylporphyrins—rapid access to meso,β-dual-functionalized porphyrins†
Satoshi Hayashi,Rina Takamatsu,Shiori Takeda,Masahiro Noji,Toshikatsu Takanami
Organic & Biomolecular Chemistry Pub Date : 11/25/2020 00:00:00 , DOI:10.1039/D0OB02262D
Abstract

A convenient method for the preparation of meso,β-dual-functionalized porphyrin was developed. The bromination of zincated β-silylporphyrin with NBS selectively yielded meso-bromo-β-silylporphyrin, whereas, the bromination of free-base β-silylporphyrin selectively yielded β-bromoporphyrin via an ipso-substitution of the silyl group. These meso,β-dual-functionalized porphyrins could be used as multipurpose synthons for fabricating various porphyrin derivatives.

Graphical abstract: Central zinc metal-controlled regioselective meso-bromination of zincated β-silylporphyrins—rapid access to meso,β-dual-functionalized porphyrins
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