alkylating agent; these alkylcobalamins and the mixtures of diastereoisomers obtained by allowing cob(I) alamin to react with the corresponding racemic alkylating agents have been characterised by high field 1H n.m.r. spectroscopy.
(2 R)-和(2 S)-2-羟丙基-,(2 R)-和(2 S)-2,3-二羟丙基-,(3 S)-3,4-二羟丁基-的立体异构纯样品, (4S)-4,5-二羟基戊基-
钴胺素是通过使
钴(I)丙
氨酸与适当的光学纯的烷基化剂反应而合成的;通过高场1 H nmr光谱对这些烷基
钴胺素和通过使Cob (I)丙
氨酸酯与相应的外消旋烷基化剂反应获得的非对映异构体混合物进行了表征。