Design of new tools for macrocyclic synthesis. Applications to the preparation of polyphosphorus macrocycles
作者:Frederic Gonce、Anne Marie Caminade、Florence Boutonnet、Jean Pierre Majoral
DOI:10.1021/jo00029a034
日期:1992.1
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.