作者:B. Sas、P. De Clercq、M. Vandewalle
DOI:10.1055/s-1997-979
日期:1997.10
1α,25-Dihydroxy-18-norvitamin D3 2a has been synthesized via two routes. In the first one, the CD-ring fragment 3 was obtained by an intermolecular Diels-Alder reaction via a decalin intermediate and subsequent ring contraction. The second approach is based on an intramolecular Diels-Alder reaction of a preconstructed nonatriene 8.
1α,25-二羟基-18-去甲维生素D3 2a已通过两种途径合成。在第一种方法中,通过分子间Diels-Alder反应经由十氢萘中间体和随后的环收缩,获得C-D环片段3。第二种方法基于预构的三烯8的分子内Diels-Alder反应。