Basic CuCO<sub>3</sub>
/ligand as a new catalyst for 'on water' borylation of Michael acceptors, alkenes and alkynes: application to the efficient asymmetric synthesis of β-alcohol type sitagliptin side chain
作者:Gaj Stavber、Zdenko Časar
DOI:10.1002/aoc.2957
日期:2013.3
The efficient 'on water' β‐borylation using bis(pinacolato)diboron agent was achieved with a newly developed catalytic system based on basic copper carbonate and various ligands. The catalytic system was used for β‐borylation of various Michael acceptors, alkenes and alkynes. The presented methodology was successfully applied to the novel synthesis of β‐alcohol type sitagliptin side chain precursor
[EN] ß-BORATION OF ALKENE AND ALKYNE INTERMEDIATES<br/>[FR] ß-BORATION D'INTERMÉDIAIRES D'ALCÈNE ET D'ALCYNE
申请人:LEK PHARMACEUTICALS
公开号:WO2013150125A1
公开(公告)日:2013-10-10
The present invention relates to the field of organic chemistry, and in particular to the preparation of β-borated compounds. These β-borated compounds can be used as intermediates in the synthesis pharmaceutically active agents such as sitagliptin.
The present invention relates to the field of organic chemistry, and in particular to the preparation of β-borated compounds. These β-borated compounds can be used as intermediates in the synthesis of pharmaceutically active agents such as Sitagliptin.
Metal catalysed hydroboration of vinyl sulfides, sulfoxides, sulfones, and sulfonates
作者:Jonathan D. Webb、Daniel J. Harrison、David W. Norman、Johanna M. Blacquiere、Christopher M. Vogels、Andreas Decken、Craig G. Bates、D. Venkataraman、R. Thomas Baker、Stephen A. Westcott
DOI:10.1016/j.molcata.2007.05.026
日期:2007.9
)propane). Although reactions of phenyl vinyl sulfoxide were complicated by a competing deoxygenation reaction, hydroborations of phenyl vinyl sulfone using HBcat once again gave regioselective formation of either the branched or linear products, depending on the choice of catalyst used to effect this transformation. Catalysed hydroborations of phenyl vinyl sulfonate were less chemo- and regioselective
Copper-Catalyzed Diastereoselective Borylative Allylation of Alkenyl Sulfones and Base-Controlled Synthesis of Skipped Dienes
作者:Minsoo Lim、Dohyun Park、Jaesook Yun
DOI:10.1021/acs.orglett.3c03753
日期:2023.12.15
Divergent functionalization of α,β-unsaturated sulfones under copper catalysis is reported. Diastereoselective borylative allylation of alkenyl sulfones was achieved with a copper catalyst, allyl phosphate, bis(pinacolato)diboron, and LiOMe. In this method, the addition of a copper–boryl complex to alkenyl sulfone and subsequent allylic substitution rendered boroallylated products in good yield with
报道了铜催化下 α,β-不饱和砜的不同官能化。使用铜催化剂、磷酸烯丙酯、双(频哪醇)二硼和LiOMe实现了烯基砜的非对映选择性硼基化烯丙基化。在该方法中,将铜-硼基络合物添加到烯基砜中并随后进行烯丙基取代,使得硼烯丙基化产物具有良好的产率和优异的顺式非对映选择性。相反,更强的碱(KO t -Bu)通过消除磺酰基和硼基基团,进一步促进反应形成( E )-跳过的二烯。