New ligands double the scope of the catalytic asymmetric dihydroxylation of olefins
摘要:
Improved ligands render terminal olefins good substrates for the osmium-catalyzed asymmetric dihydroxylation (ADH) process, and the amounts of chiral ligand and osmium catalyst required diminish dramatically.
Improved enantioselectivity in asymmetric dihydroxylations of terminal olefins using pyrimidine ligands
作者:Gerard A. Crispino、Kyu Sung Jeong、Hartmuth C. Kolb、Zhi Min Wang、Daqiang Xu、K. Barry Sharpless
DOI:10.1021/jo00067a002
日期:1993.7
Bis-cinchona alkaloid substituted pyrimidine ligands were found to give improved enantioselectivity in the osmium-catalyzed asymmetric dihydroxylation (AD) of monosubstituted terminal olefins.