Conformational Study of Some Saturated 2-[Bis(2-chloroethyl)amino]-1,3,2-benzoxazaphosphorinane 2-Oxides
作者:Tapio Viljanen、Petri Tähtinen、Kalevi Pihlaja、Ferenc Fülöp
DOI:10.1021/jo971490p
日期:1998.2.1
trans-fused 2-[bis(2-chloroethyl)amino]-3,4,4a,5,6,7,8,8a-octahydro-1,3,2-benzoxazaphosphorinane 2-oxides and their 3-methyl and 3-benzyl derivatives were performed by (1)H, (13)C, (31)P, and variable-temperature NMR methods. Depending on the P-2 configuration and the substituent on N-3, different equilibria between chair-chair and chair-twist-boat conformations were found for the trans-fused isomers. The N-3