Affiliation:
1. Institut für Anorganische und Analytische Chemie der Technischen Universität, Hagenring 30, D-38023 Braunschweig
Abstract
The 1,3,5-trimethyl-1,3,5-triaza-2-oxo-2λ4-phosphinane-4,6-diones 7 and 8 were obtained from the 6,8,10-trimethyl-2,2,3,3-tetrakis(trifluoromethyl)-6,8,10-triaza-1,4-dioxa-5 λ5-phosphaspiro[4.5]decane-7,9-diones 3 and 5, either by reaction with water or on heating; in the latter case we assume that tetrakis(trifluoromethyl)oxirane was eliminated. The hydrolysis of 2-(β-chloroethyl)amino-1,3,5-trimethyl-1,3,5-triaza-2-[p-nitrobenzoylimido]-2A4-phosphinane-4,6-dione 4 and of 5-bis-(β-chloroethyl)-amino-6,8,10-trimethyl-2,3-perchlorobenzo-6,8,10-triaza-1,4-dioxa-5λ5-phosphaspiro[4.5]decane-7,9-dione 6, in the same manner, gave the products 7 and 8. The synthesis of the perfluoropinacolyl spirophosphorane 3 is described. The compounds 3,7 and 8 were characterized from their 1H, 13C and 31P NMR spectra, mass spectra and through the X-ray structure determination of 8, in which the ring displays a flattened envelope conformation.