Reduction of nitro- and nitroso-compounds by tervalent phosphorus reagents. Part XII. Conversion of aryl 2-nitroaryl ethers into novel 3-aryl-2,3-dihydro-1,3,2-benzoxazaphosph(V)oles (oxazaphosphoranes) and their 2-oxo-derivatives
作者:J. I. G. Cadogan、David S. B. Grace、Peter K. K. Lim、Brian S. Tait
DOI:10.1039/p19750002376
日期:——
R3= Me, R4= CO2Me) with tervalent phosphorus reagents (4 mol. equiv.)(R2R12P: R1= R2= MeO, EtO, or PriO; R1= EtO, R2= Me; R1= MeO, R2= Ph; R1= Ph, R2= MeO; R12=–O·CH2·CH2·O–, R2= Ph) give novel pentaco-ordinate phosphorus compounds, the 3-aryl-2,3-dihydro-1,3,2-benzoxazaphosph(V)oles (8)(12–95%). These are very rapidly hydrolysed in water to give tetraco-ordinate phosphorus compounds, 2-alkoxy-3-aryl-
芳基2-硝基芳基醚(2-NO 2 ·C 6 H 4 ·O·C 6 H 2 R 3 2 R 4:在异丙苯中的反应:R 3= Me,R 4= H; R 3= R 4= Me; R 3 = OMe,R 4 = H; R 3 = H,R 4 = OMe; R 3 = R 4 = H; R 3 = H,R 4 = Me; R 3 = Me,R 4 = CO 2 Me)与三价磷试剂(4摩尔当量)(R 2 R1 2 P:R 1 = R 2 = MeO,EtO或Pr i O;R 1= EtO,R 2= Me;R 1= MeO,R 2= Ph;R 1= Ph,R 2= MeO;R 1 2 = –O·CH 2 ·CH 2 ·O–,R 2 = Ph)得到新颖的五配位磷化合物,3-芳基-2,3-二氢-1,3,2-苯并氮杂磷( V)oles(8)(12–95%)。它们在水中迅速水解,得到四配位磷化合物,2-烷氧基-