KHSO<sub>4</sub>-Mediated Condensation Reactions of <i>tert</i>-Butanesulfinamide with Aldehydes. Preparation of <i>tert</i>-Butanesulfinyl Aldimines
作者:Yong Qin、Zhiyan Huang、Min Zhang、Yin Wang
DOI:10.1055/s-2005-865234
日期:——
tert-butanesulfinyl aldimines 1 were prepared by direct condensation of chiral tert-butanesulfinamide 3 with aldehydes 2 in high yields in the presence of KHSO 4 . The main advantage of KHSO 4 is that it is applicable to the condensation reactions of a variety of aldehydes, including electron deficient and electron rich (hetereo)aromatic aldehydes, as well as aliphatic aldehydes.
O
<sub>2</sub>
‐Assisted Four‐Component Reaction of Vinyl Magnesium Bromide with Chiral
<i>N</i>
‐
<i>tert</i>
‐Butanesulfinyl Imines To Form
<i>syn</i>
‐1,3‐Amino Alcohols
作者:Runping Wang、Jingfan Luo、Chunmei Zheng、Hongyun Zhang、Lu Gao、Zhenlei Song
DOI:10.1002/anie.202109566
日期:2021.11.8
a new use: Vinyl magnesium bromide, a widely used Grignard reagent, can be oxygenated with O2 to give a magnesium enolate intermediate. This enables a four-component reaction that efficiently converts chiral N-tert-butanesulfinyl imine into a wide range of syn-1,3-amino alcohols in one step.
旧试剂新用途:乙烯基溴化镁是一种广泛使用的格氏试剂,可与 O 2氧化得到烯醇镁中间体。这使得四组分反应能够在一个步骤中有效地将手性N -叔丁烷亚磺酰基亚胺转化为范围广泛的顺-1,3- 氨基醇。
Asymmetric synthesis of C–F quaternary α-fluoro-β-amino-indolin-2-ones via Mannich addition reactions; facets of reactivity, structural generality and stereochemical outcome
作者:Chen Xie、Wanxing Sha、Yi Zhu、Jianlin Han、Vadim A. Soloshonok、Yi Pan
DOI:10.1039/c6ra27710a
日期:——
Reported herein is a new approach for the preparation of enantiomerically pure α-fluoro-β-amino-indolin-2-ones possessing tetrasubstituted fluorinated stereogenic centers. This method includes the detrifluoroacetylative in situ generation of tertiary enolates followed by Mannich reaction with (Ss)-sulfinylimines. The operationally convenient conditions coupled with perfect diastereoselectivity and
A Room-Temperature Protocol for the Rhodium(I)-Catalyzed Addition of Arylboron Compounds to Sulfinimines
作者:Yuri Bolshan、Robert A. Batey
DOI:10.1021/ol050014f
日期:2005.4.14
of organoboronic acids to chiralsulfinimines proceeds under mild conditions at room temperature, using Rh(I) catalysis in the absence of external phosphine ligands. Clean reaction only occurs in the presence of water as a cosolvent. The sulfinamide adducts are formed with high diastereoselectivities, providing a convenient route to the synthesis of enantiomerically enriched chiral benzylic amines.
The present invention relates to the use of novel pyrrolopyrazine derivatives of Formula I,
wherein the variables are defined as described herein, which inhibit JAK and SYK and are useful for the treatment of auto-immune and inflammatory diseases.