Widely Applicable Synthesis of Enantiomerically Pure Tertiary Alkyl-Containing 1-Alkanols by Zirconium-Catalyzed Asymmetric Carboalumination of Alkenes and Palladium- or Copper-Catalyzed Cross-Coupling
for the synthesis of various chiral 2‐alkyl‐1‐alkanols, especially those of feeble chirality, has been developed. It consists of zirconium‐catalyzed asymmetric carboalumination of alkenes (ZACA), lipase‐catalyzed acetylation, and palladium‐ or copper‐catalyzed cross‐coupling. By virtue of the high selectivity factor (E) associated with iodine, either (S)‐ or (R)‐enantiomer of 3‐iodo‐2‐alkyl‐1‐alkanols
已经开发了一种高对映选择性和广泛适用的方法,用于合成各种手性 2-烷基-1-烷醇,尤其是手性弱的那些。它由锆催化的烯烃不对称碳铝化(ZACA)、脂肪酶催化的乙酰化和钯或铜催化的交叉偶联组成。凭借与碘相关的高选择性因子 ( E ),通过烯丙醇的 ZACA 反应制备的 3-碘-2-烷基-1-烷醇 ( 1 ) 的( S )-或 ( R )-对映体可以易于纯化至 ≥ 99 % ee的水平通过脂肪酶催化的乙酰化。多种手性含叔烷基醇,包括那些原本难以制备的醇,现在可以通过 Pd-或 Cu 催化的(S)-1或(R)-2交叉偶联以高对映体纯度合成用于引入各种一级、二级和三级碳基团,同时保留所有碳骨架特征。这些手性含叔烷基的醇可以进一步转化为相应的酸,并完全保留立体化学。该方法的效用的合成已经在高度对映体选择性(≥99%被证明EE)和(高效合成- [R)-2-甲基-1-丁醇和(- [R ) -和(小号)-金黄酸。
[EN] PROCESSES FOR THE SYNTHESIS OF CHIRAL 1-ALKANOLS<br/>[FR] PROCÉDÉS DE SYNTHÈSE DE 1-ALCANOLS CHIRAUX
申请人:PURDUE RESEARCH FOUNDATION
公开号:WO2015106045A1
公开(公告)日:2015-07-16
The invention relates to highly enantioselective processes for the synthesis of chiral 1-alkanols via Zr-catalyzed asymmetric carboalumination of alkenes.
这项发明涉及通过锆催化的不对称烯烃碳铝化反应合成手性1-烷醇的高对映选择性过程。
PROCESSES FOR THE SYNTHESIS OF CHIRAL 1-ALKANOLS
申请人:PURDUE RESEARCH FOUNDATION
公开号:US20160332940A1
公开(公告)日:2016-11-17
The invention relates to highly enantioselective processes for the synthesis of chiral 1-alkanols via Zr-catalyzed asymmetric carboalumination of alkenes.
这项发明涉及通过Zr催化的不对称烯烃碳硼烷化反应合成手性1-烷醇的高对映选择性过程。
NOVEL CYCLOSPORIN DERIVATIVES AND USES THEREOF
申请人:SU Zhengyu
公开号:US20160039879A1
公开(公告)日:2016-02-11
The present invention relates to a compound of the Formula (I)): or pharmaceutically acceptable salt thereof, wherein the symbols are as defined in the specification; a pharmaceutical composition comprising the same, a method for treating or preventing viral infections, inflammation, dry eye, central nervous disorders, cardiovascular diseases, cancer, obesity, diabetes, muscular dystrophy, and hair loss.
Copper-Catalyzed Coupling of Alkyl Vicinal Bis(boronic Esters) to an Array of Electrophiles
作者:Ningxin Xu、Ziyin Kong、Johnny Z. Wang、Gabriel J. Lovinger、James P. Morken
DOI:10.1021/jacs.2c02817
日期:2022.10.5
between vicinal bis(boronic esters) and allyl, alkynyl, and propargyl electrophiles as well as a simple proton. Because the reactive substrates are vicinal bis(boronic esters), the cross-coupling described herein provides an expedient new method for the construction of boron-containing reaction products from alkenes. Mechanistic experiments suggest that chelated cyclic ate complexes may play a role in