1586
J. Org. Chem. 1980,45, 1586-1589
M - C15H31), 183 (8.3, M - C15H31CO), 127 (61.8, PO4H2Mez),109 (22.1, P03Me2). Anal. Calcd for C21H4306P:C, 59.69; H, 10.26; P, 7.33. Found: C, 60.02; H, 10.54; P, 7.37. trans-4: yield after TLC8 purification (10:90 hexane-Eh0, v/v; R, 0.15) 73%; mp 37-38 “C; mass spectrum, m / e 422 (
