A new bifunctional catalyst for tandem Heck-asymmetric dihydroxylation of olefins.
A new bifunctional catalyst consisting of active palladium and osmium species anchored on silica gel through a mercaptopropyl spacer and a cinchona alkaloid respectively has been prepared for the first time and used in the heterogeneous tandem Heck-asymmetric dihydroxylation of olefins to afford diols with excellent yields and enantiomeric excesses (ee's) in presence of N-methylmorpholine N-oxide or K3Fe(CN)6 as cooxidants.
Indian Institute of Chemical Technology, Hyderabad 500 007, India. choudary@iict.ap.nic.in
Boyapati M
BM
Choudary
Naidu S
NS
Chowdari
Karangula
K
Jyothi
Nadakuditi S
NS
Kumar
Mannepalli L
ML
Kantam