N-Heterocyclic Carbene Catalyzed Dynamic Kinetic Resolution of Pyranones
作者:Changgui Zhao、Fangyi Li、Jian Wang
DOI:10.1002/anie.201508205
日期:2016.1.26
The dynamickineticresolution of 6‐hydroxypyranones with enals or alkynals through an asymmetric redox esterification is catalyzed by a chiral N‐heterocyclic carbene. The resulting esters are obtained in good to high yields and with high levels of enantio‐ and diastereocontrol. The reaction products are further derivatized to obtain functionalized sugar derivatives and natural products.
Phenylhydrazone, ihre Herstellung und daraus hergestellte Arzneimittel und Kosmetika
申请人:BASF Aktiengesellschaft
公开号:EP0382076A1
公开(公告)日:1990-08-16
Es werden Phenylhydrazone der Formel I
worin R¹-R⁶ sowie m und n die in der Beschreibung angegebene Bedeutung haben, und deren Herstellung beschrieben. Die Substanzen eignen sich zur Bekämpfung von Krankheiten und als kosmetische Mittel.
式 I 的苯肼化合物
其中 R¹-R⁶ 和 m 及 n 的含义见说明及其制备方法。这些物质适用于防治疾病和用作化妆品。
US5015674A
申请人:——
公开号:US5015674A
公开(公告)日:1991-05-14
US5072042A
申请人:——
公开号:US5072042A
公开(公告)日:1991-12-10
Solid-Supported Sulfonylhydroxylamine as an Effective N-Aminating Agent of Anilines
作者:Hiroshi Ohno、Takashi Takahashi、Hiroshi Tanaka
DOI:10.1055/s-2005-865218
日期:——
An effective method for the synthesis of aryl hydrazines by amination of anilines using the solid-supported phenylsulfonyl-hydroxylamine was described. Treatment of aniline with the solid-supported aminating agent, followed by removal of the resin, provided the corresponding hydrazine in 21% yield. The resulting hydrazines were directly adapted to the solid-phase synthesis of indoles, providing nine