New carborane-containing amino acids and their derivatives. Crystal structures of n-protected carboranylalaninates
作者:S. V. Timofeev、V. I. Bregadze、S. N. Osipov、I. D. Titanyuk、P. V. Petrovskii、Z. A. Starikova、I. V. Glukhov、I. P. Beletskaya
DOI:10.1007/s11172-007-0118-9
日期:2007.4
New alanine derivatives containing both the carboranyl and trifluoromethyl groups were synthesized by the reaction of organometallic derivatives of o-carborane with methyl trifluoropyruvate imines. When using the 1R-(−)-menthoxycarbonyl protecting group at the nitrogen atom, one of diastereomers was isolated and characterized. Trifluoromethyl-carboranylalanine methyl esters containing different protecting groups at the nitrogen atom were studied by X-ray diffraction. Both complete and partial deprotection of the amino and carboxy groups was performed.
通过邻碳硼烷的有机金属衍生物与三氟丙酮酸甲酯亚胺的反应,合成了含有碳硼酰基和三氟甲基的新丙氨酸衍生物。当在氮原子上使用 1R-(-)-甲氧羰基保护基团时,分离并表征了其中一种非对映异构体。通过 X 射线衍射研究了氮原子上含有不同保护基团的三氟甲基-硼丙氨酸甲酯。对氨基和羧基进行了完全和部分脱保护。