Conformational and crystal packing differences in (+)-7,8-Di-tert-butoxy-1- phenyloctahydro-1H-pyrrolo(1,2-b)-1H-phospholo(2,3-d)isoxazole 1-oxide diastereoisomers
作者:Rafal Kruszynski、Wanda Wieczorek
DOI:10.1002/hc.20160
日期:——
molecular structures of (1S,3aR,7S,8S,8aR,8bR)-(+)-7,8-Di-tert-butoxy-1-ph- enyloctahydro-1H-pyrrolo(1,-b)-1H-phospholo(2,- d)isoxazole 1-oxide (III, hereafter) and (1R,3aS,7S, 8S,8aS,8bS)-(+)-7,8-Di-tert-butoxy-1-phenyloctahyd- ro-1H-pyrrolo(1,2-b)-1H-phospholo(2,3-d)isoxazole 1- oxide (IV, hereafter) have been determined. III crystallizes in space group P212121, and IV in P21 one. The conformational
(1S,3aR,7S,8S,8aR,8bR)-(+)-7,8-Di-tert-butoxy-1-phenyloctahydro-1H-pyrrolo(1,-b)-的晶体和分子结构1H-phospholo(2,-d)isoxazole 1-oxide (III, 下文) 和 (1R,3aS,7S, 8S,8aS,8bS)-(+)-7,8-Di-tert-butoxy-1-phenyloctahyd - ro-1H-吡咯并(1,2-b)-1H-磷并(2,3-d)异恶唑1-氧化物(IV,下文)已被测定。III 在 P212121 空间群中结晶,IV 在 P21 空间群中结晶。褶皱杂原子三环系统的构象分析表明,褶皱幅度Q2 = 0.397 A的明显扭曲包络的构象,Q2 = 0.353 A的扭曲和包络之间的中间构象,以及Q2 = 0.451 A的半椅构象,分别为 III 的磷烷、恶唑烷和吡咯烷环。IV分子中的环采用包膜构象,Q2