Syntheses of C2-symmetric vicinal diamines derived from tartaric acid
摘要:
C-2-symmetric vicinal diamines 3b-f, derived from L-tartaric acid, with increasingly bulky terminal ether functionalities were prepared using two distinct sequences. Diamines 3b,c were obtained from the corresponding vicinal diols 4b,c, while diamines 3d-f were generated from dihydroxydiazide 7 via deprotection-reprotection strategies. (C) 1999 Elsevier Science Ltd. All rights reserved.
Reverse asymmetric catalytic epoxidation of unfunctionalized alkenes
作者:Andreas Scheurer、Paul Mosset、Martina Spiegel、Rolf W. Saalfrank
DOI:10.1016/s0040-4020(98)01106-5
日期:1999.1
from tartaric-derived alicyclic C2 symmetric vicinal diamines were studied in the catalysis of the asymmetricepoxidation of unfunctionalized alkenes. Although the enantioselectivities obtained were not as high as for Jacobsen and Katsuki catalysts, the most striking result was the reversed asymmetric induction.
Syntheses of C2-symmetric vicinal diamines derived from tartaric acid
作者:Andreas Scheurer、Paul Mosset、Rolf W. Saalfrank
DOI:10.1016/s0957-4166(99)00353-5
日期:1999.9
C-2-symmetric vicinal diamines 3b-f, derived from L-tartaric acid, with increasingly bulky terminal ether functionalities were prepared using two distinct sequences. Diamines 3b,c were obtained from the corresponding vicinal diols 4b,c, while diamines 3d-f were generated from dihydroxydiazide 7 via deprotection-reprotection strategies. (C) 1999 Elsevier Science Ltd. All rights reserved.