Design of new tools for macrocyclic synthesis. Applications to the preparation of polyphosphorus macrocycles
摘要:
New diphosphorus m,m' or p,p' dialdehydes 2-7 were prepared by treatment of 1,3-di-tert-butyldiaza-2,4-dichlorodiphosphetidine, 1, with 3- or 4-hydroxybenzaldehyde, and in the case of 4-7 in the presence of S8. These initial compounds when reacted with phosphodihydrazides RP(X) (NCH3NH2)2 9 and 10 allowed the preparation, via [2 + 2] cyclocondensation reactions, of macrocycles 11-13, 15, and 16 possessing six phosphorus atoms in the skeleton, different coordination modes (tri- or tetracoordinate) and both N-P-N and O-P-N linkages. Reaction of the tetraphosphorus dihydrazide 20 with 1,2-benzenedicarboxaldehyde gave macrocycle 22 with a total annular size of 29 ring atoms. Macrocycles 23 or 24 were obtained by reacting 20 with 2,6-pyridinedicarboxaldehyde or 1,3-benzenedicarboxaldehyde. Asymmetry can also be introduced via [1 + 1] cyclocondensation of tetraphosphorus dihydrazides 18 or 19 with diphosphorus dialdehydes 3 or 2; these reactions led to the 38-membered cyclic product 25. Two macrocycles 27, 28 incorporating five phosphorus atoms with three different types of phosphorus environments (C-P-C,N-P-N, and O-P-N) were obtained when tetraphosphorus dihydrazides 18 or 20 were reacted with the phosphorus dialdehyde 26. All the reactions were found stereospecific.
Design of new tools for macrocyclic synthesis. Applications to the preparation of polyphosphorus macrocycles
摘要:
New diphosphorus m,m' or p,p' dialdehydes 2-7 were prepared by treatment of 1,3-di-tert-butyldiaza-2,4-dichlorodiphosphetidine, 1, with 3- or 4-hydroxybenzaldehyde, and in the case of 4-7 in the presence of S8. These initial compounds when reacted with phosphodihydrazides RP(X) (NCH3NH2)2 9 and 10 allowed the preparation, via [2 + 2] cyclocondensation reactions, of macrocycles 11-13, 15, and 16 possessing six phosphorus atoms in the skeleton, different coordination modes (tri- or tetracoordinate) and both N-P-N and O-P-N linkages. Reaction of the tetraphosphorus dihydrazide 20 with 1,2-benzenedicarboxaldehyde gave macrocycle 22 with a total annular size of 29 ring atoms. Macrocycles 23 or 24 were obtained by reacting 20 with 2,6-pyridinedicarboxaldehyde or 1,3-benzenedicarboxaldehyde. Asymmetry can also be introduced via [1 + 1] cyclocondensation of tetraphosphorus dihydrazides 18 or 19 with diphosphorus dialdehydes 3 or 2; these reactions led to the 38-membered cyclic product 25. Two macrocycles 27, 28 incorporating five phosphorus atoms with three different types of phosphorus environments (C-P-C,N-P-N, and O-P-N) were obtained when tetraphosphorus dihydrazides 18 or 20 were reacted with the phosphorus dialdehyde 26. All the reactions were found stereospecific.