First efficient synthesis of novel oxophenyl-arcyriaflavin analogs
摘要:
New oxophenylarcyriaflavins were synthesized in a few efficient steps. The key steps involved at first a palladium cross-coupling between the 3-bromo-4-(1H-indol-3-yl)1-methyl pyrrole-2,5-dione and the 2-formylphenylboronic acid or a methyl 2-trialkylstannylbenzoate, followed by an intramolecular acylation in a C-2 indolic position. All the sequence was carried out without any indolic protective group. (c) 2005 Elsevier Ltd. All rights reserved.
New oxophenylarcyriaflavins were synthesized in a few efficient steps. The key steps involved at first a palladium cross-coupling between the 3-bromo-4-(1H-indol-3-yl)1-methyl pyrrole-2,5-dione and the 2-formylphenylboronic acid or a methyl 2-trialkylstannylbenzoate, followed by an intramolecular acylation in a C-2 indolic position. All the sequence was carried out without any indolic protective group. (c) 2005 Elsevier Ltd. All rights reserved.
A Sn atom-economical approach toward arylstannanes: Ni-catalysed stannylation of aryl halides using Bu<sub>3</sub>SnOMe
作者:Kimihiro Komeyama、Ryota Asakura、Ken Takaki
DOI:10.1039/c5ob01096a
日期:——
straightforward approaches for the preparation of organostannane compounds. Although a wide variety of methods are now available, all protocols require the use of highly nucleophilic organometals or wasteful stannyl sources like distannanes. Here, we report a new nickel-catalysed stannylation of aryl and alkenyl-halides using Bu3SnOMe as a stannyl source to afford aryl and vinyl-stannanes, respectively. This