Three diastereomers of (1S) 3-3′-di-t-butyl-1,1′-spirobi [benz[f] indan] have been prepared. In the 1Bb region all the isomers showed typical c.d. couplets of negative sign, reflecting the identity of configuration at the spiro center irrespective of their different conformations.
制备了(1 S)3-3'-二叔丁基-1,1'-spirobi [benz [ f ] indan ]的三种非对映异构体。在1 B b区域,所有异构体均显示出典型的带有负号的cd对,反映出螺中心的构型相同,而不论它们的构象如何。
Stereospecific, photochemical rearrangement of 1,1′-spirobiindene and 1,1′-spirobi[benzindene]S
The photochemicalrearrangement, of optically active 3,3′-di-t-butyl-1,1−spirobiindene and −1,1′-spirobi[benzindene]s afforded, respectively, 5,7-di-t-butylbenzo[c]fluorene and its dibenzo derivatives with high stereospecificity.
光化学重排,光学活性的3,3'-二-吨-丁基-1,1- spirobiindene和-1,1'-螺二[苯并茚] S得到,分别为5,7-二-吨-butylbenzo [ C ^具有高立体特异性的]芴及其二苯并衍生物。
IMAJO SEIICHI; SHINGU KEIJI; KURITANI HIROKO; KATO ATSUMASA, TETRAHEDRON LETT., 1981, 22, NO 2, 107-110