Use of intramolecular [3 + 2] cycloaddition reactions in the synthesis of natural products. A stereospecific synthesis of (.+-.)-biotin from cycloheptene
A novel process for the preparation of biotin is disclosed wherein said process employs inexpensive starting materials and reagents resulting in the obtention of biotin devoid of the biologically inactive stereoisomers.
Novel cycloheptathiophene intermediates for the synthesis of biotin
申请人:Hoffmann-La Roche Inc.
公开号:US04228295A1
公开(公告)日:1980-10-14
A novel process for the preparation of biotin is disclosed wherein said process employs inexpensive starting materials and reagents resulting in the obtention of biotin devoid of the biologically inactive stereoisomers.
A novel process for the preparation of biotin is disclosed wherein said process employs inexpensive starting materials and reagents resulting in the obtention of biotin devoid of the biologically inactive stereoisomers.