Novel process for the manufacture of thiophene derivatives suited for the manufacture of biotin, process for the manufacture of biotin and novel intermediates in this process
申请人:F. HOFFMANN-LA ROCHE & CO.
Aktiengesellschaft
公开号:EP0011777A1
公开(公告)日:1980-06-11
The process starts from L-cystine and proceeds via various novel intermediates, particularly the isoxazolines and isoxazolidines of the formulae I and II.
该过程以 L-胱氨酸为起点,通过各种新型中间体,特别是式 I 和式 II 中的异噁唑啉类和异噁唑烷类进行。
US4245104A
申请人:——
公开号:US4245104A
公开(公告)日:1981-01-13
Synthesis of d-biotin from cysteine
作者:H.L. Lee、E.G. Baggiolini、M.R. Uskoković
DOI:10.1016/s0040-4020(01)87671-7
日期:1987.1
A novel approach to d-biotin from cysteine, which a utilizes the nitrate oxide To enolthioether double bond cyclization for the formation of C2-C3 of the thiophane ring and the incorporation of the 3-N in the biotin molecule, Is described. the cis relation of the n-butyl side chain and the sulfur in respect to isoxazolidine ring in the bicycle diastereomers And is characterized by an NMR signal For