TRICOORDINATED PHOSPHORUS-CONTAINING MACROCYCLES - NEW SYNTHETIC STRATEGIES

Phosphorus dialdehydes RP (OC6H4CHO)(2) (R = Ph, Me(2)N) react with ph osphodihydrazides PhP(Y)-[N(CH3)NH2](2) (Y = S, O) to give macrocycles 6a-c arising from [2 + 2] cyclocondensation reactions. Treatment of p hosphodihydrazone PhP(S) [OC6H4CH=N-N(Me)H](2) 7 with phenyldichloroph osphine affords macrocycle 8 possessing tri and tetracoordinated phosp horus atoms. Clean desulfurizaton of thiophosphorus macrocycles 9 and 12 gives rise selectively to new tricoordinated phosphorus containing macrocycles 11 and 13.