The synthesis of the optically-active sodium salt of tetrakis(4,5,6,7-tetrahydro-7,8,8-trimethyl-2H-4,7-methanoindazolyl)borate, [NaB-(camphpz)4] (1) is reported. Cu-based in situ catalysts containing [NaB(camphpz)4] give an enantiomeric excess of up to 62% in the enantioselective cyclopropanation of styrene with ethyl diazoacetate.
作者:Henri Brunner、Udai P. Singh、Thomas Boeck、Stefan Altmann、Thomas Scheck、Bernd Wrackmeyer
DOI:10.1016/0022-328x(93)80027-9
日期:1993.1
The synthesis of the optically-active sodium salt of tetrakis(4,5,6,7-tetrahydro-7,8,8-trimethyl-2H-4,7-methanoindazolyl)borate, [NaB-(camphpz)4] (1) is reported. Cu-based in situ catalysts containing [NaB(camphpz)4] give an enantiomeric excess of up to 62% in the enantioselective cyclopropanation of styrene with ethyl diazoacetate.
Babbar; Brunner; Singh, Indian Journal of Chemistry, Section A: Inorganic, Physical, Theoretical and Analytical, 2001, vol. 40, # 3, p. 225 - 227
作者:Babbar、Brunner、Singh
DOI:——
日期:——
Nyman; Alfthan, Suomen Kemistiseuran Tiedonantoja, 1943, vol. 52, p. 291,300
作者:Nyman、Alfthan
DOI:——
日期:——
Wallach; Steindorff, Justus Liebigs Annalen der Chemie, 1903, vol. 329, p. 130