Benzothiazines in organic synthesis. An approach to floresolide B
摘要:
The intramolecular conjugate addition of a sulfoximine carbanion to an alpha,beta-unsaturated ester results in the formation of a benzothiaine bearing a benzylic stereocenter with extremely high fidelity. We have used this methodology to complete a formal total synthesis of the antitumor agent (+)-floresolide B. (C) 2011 Elsevier Ltd. All rights reserved.
Benzothiazines in organic synthesis. An approach to floresolide B
摘要:
The intramolecular conjugate addition of a sulfoximine carbanion to an alpha,beta-unsaturated ester results in the formation of a benzothiaine bearing a benzylic stereocenter with extremely high fidelity. We have used this methodology to complete a formal total synthesis of the antitumor agent (+)-floresolide B. (C) 2011 Elsevier Ltd. All rights reserved.
Oxidation of 4-methoxyanilines to 1,4-benzoquinones using ceric ammonium nitrate (CAN)
作者:Yugang Chen、Weijiang Ying、Michael Harmata
DOI:10.1016/j.tetlet.2010.11.070
日期:2011.1
Treatment of substituted 4-methoxyanilines with cericammoniumnitrate in a 1:1 mixture of water and acetonitrile resulted in the formation of 1,4-benzoquinones in acceptable yields.