Mannich-type condensation products of sulfinic acids with aldehydes and hydroxylamines or hydroxamic acids
作者:G. Rawson、J.B.F.N. Engberts
DOI:10.1016/s0040-4020(01)98774-5
日期:1970.1
Hydroxylamine and some of its derivatives, including hydroxamic acids, have been used as the amine component in Mannich-type condensation reactions with aldehydes and sulfinic acids or thiols. The condensationproducts have been oxidized to the corresponding nitroxides. The ESR spectra of these nitroxides are reported and interpreted in terms of the structure of these radicals. In several cases the
Mukhacheva, O. A.; Shchelkunova, M. A.; Razumov, A. I., Journal of general chemistry of the USSR, 1980, vol. 50, # 5, p. 809 - 811
作者:Mukhacheva, O. A.、Shchelkunova, M. A.、Razumov, A. I.
DOI:——
日期:——
Spirophosphoranes a liaison P-OH. Synthese, tautomerie
作者:A. Munoz、B. Garrigues、M. Koenig
DOI:10.1016/0040-4020(80)80225-0
日期:1980.1
Spirophosphoranes with a P-OH bond have been prepared as free acid (compound 5c), triethylammonium salts (compounds 2c–6c), or adducts with DMF (compounds 5c and 6c). The ionic feature of triethylammonium salts of compounds 1c–6c, shows that these Spirophosphoranes are relatively strong Brønsted's acids. Tautomeric equilibrium phosphoric ester—phosphorane with a P-OH bond [Scheme 9), shown in many