申请人:Pan Yajin
公开号:US20120065406A1
公开(公告)日:2012-03-15
The invention discloses the improved preparation method for D-Biotin. If the composite method takes the malonic acid diester as the raw material, the finial biotin will be generated with impurities. The features of the invention refers to the improved preparation method for D-Biotin includes: firstly, (3aS,4S,6aR)-1,3-dibenzyl-4-(ω,ω,ω-3 -alkoxycarbonyl bytyl)-4H-1H-thiophene[3,4-d]iminazole-2,4(1H)-ketone is got after the methane tricarboxylic acid trialkyl ester and (3aR,8aS,8bS)-1,3-dibenzyl-2-oxo-10H-iminazole[3,4-d]thiophene[1,2-a]sulfuryl halide have the condensation reaction in the alkaline environment and then D-Biotin can be got after the reaction process of hydrolysis, decarboxylation and closed loop. The invention succeeds in greatly improving the biotin quality from the original basis and simultaneously avoids the generation of impurities and the occurrence of side reaction.
本发明公开了改进的D-生物素制备方法。如果复合方法以马隆酸二酯为原料,则最终生物素将带有杂质。本发明的特点是改进的D-生物素制备方法包括:首先,在碱性环境中,甲烷三羧酸三烷基酯和(3aR,8aS,8bS)-1,3-二苄基-2-氧代-10H-咪唑[3,4-d]噻吩[1,2-a]磺酰卤与(3aS,4S,6aR)-1,3-二苄基-4-(ω,ω,ω-3-烷氧羰基丁基)-4H-1H-噻吩[3,4-d]咪唑-2,4(1H)-酮发生缩合反应,然后通过水解、脱羧和闭环反应过程得到D-生物素。本发明成功地大大提高了生物素的质量,同时避免了杂质的产生和副反应的发生。