Regiocontrolled allylic functionalization of internal alkene <i>via</i> selenium-π-acid catalysis guided by boron substitution
作者:Ling Yang、Yuan Liu、Wen-Xin Fan、Dong-Hang Tan、Qingjiang Li、Honggen Wang
DOI:10.1039/d2sc00954d
日期:——
received increasing attention as a powerful tool for olefin functionalization, but the regioselectivity is often problematic. Reported herein is a selenium-catalyzed regiocontrolled olefin transpositional chlorination and imidation reaction. The reaction outcome benefits from an allylic B(MIDA) substitution. And the stabilization of α-anion from a hemilabile B(MIDA) moiety was believed to be the key
Acetyl chloride–ethanol brings about a remarkably efficient conversion of allyl acetates into allyl chlorides
作者:Veejendra K Yadav、K Ganesh Babu
DOI:10.1016/j.tet.2003.09.063
日期:2003.11
AcCl-EtOH transforms primary and secondary allyl acetates into allyl chlorides that retain the olefinic bond in the more stable position. Whereas secondary allyl alcohols also react with almost the same efficacy as the acetates, the reactions of primary allyl alcohols that possess 1,2-disubstituted alkenes are very slow. The products are isolated in high state of purity simply by removal of the volatiles. (C) 2003 Published by Elsevier Ltd.
PEG-BASED MACROMONOMERS, CHEMICALLY INERT POLYMERS PREPARED THEREFROM AND THE USE OF THESE POLYMERS FOR ORGANIC SYNTHESIS AND ENZYME REACTIONS
申请人:Carlsberg A/S
公开号:EP1137690A2
公开(公告)日:2001-10-04
US7064179B1
申请人:——
公开号:US7064179B1
公开(公告)日:2006-06-20
[EN] PEG-BASED MACROMONOMERS, CHEMICALLY INERT POLYMERS PREPARED THEREFROM AND THE USE OF THESE POLYMERS FOR ORGANIC SYNTHESIS AND ENZYME REACTIONS<br/>[FR] MACROMONOMERES A BASE DE PEG, POLYMERES INERTES AU PLAN CHIMIQUE, PREPARES A PARTIR DESDITS MACROMONOMERES ET UTILISATION DESDITS POLYMERES POUR LA SYNTHESE ORGANIQUE ET LES REACTIONS ENZYMATIQUES
申请人:CARLSBERG AS
公开号:WO2000018823A2
公开(公告)日:2000-04-06
The present invention relates to macromonomers containing ethylene glycol repeat units, to chemically inert polymers prepared therefrom and to the use of such polymers in solid phase biochemical assays. A macromonomer of polyethylene glycol having repeat units in the range 6-300 and having at least one end terminated by an ether group having formula (I) where m is an integer of 0-10, a is an integer of 1-4, and R is H or alkyl or aryl or arylalkyl; or having formula (II) where m is an integer of 1-10, and R is H or alkyl or aryl or arylalkyl.