An Improved Preparation Method for D-Biotin
The invention discloses an improved preparation method for D-Biotin. If the composite method takes the diesteas 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-ωωω -butyl)-1H-thiaphene[3,4-d]-2,4(1H)-ketone is got after the methane tricarboxylic acid trialkyl ester and (3aR, 8aS, 8bS)-1,3-2-[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, decarbaxylation 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.
一种改进的 D-
生物素制备方法
本发明公开了一种改进的 D-
生物素制备方法。D-
生物素的制备方法是以淀粉为原料,采用复合法制备
生物素,最终生成的
生物素含有杂质,而D-
生物素的制备方法是以淀粉为原料,采用复合法制备
生物素。本发明的特征在于改进的 D-
生物素制备方法包括:首先,以
甲烷三羧酸三烷基酯和(3aR, 8aS, 8bS)-1,3-2-[3,4-d]thiophene [1、2-a]
硫酰卤在碱性环境中发生缩合反应,经过
水解、脱羧基和闭环反应过程后得到 D-
生物素。本发明成功地在原有基础上大大提高了
生物素的质量,同时避免了杂质的产生和副反应的发生。