Morpholino-azahomotricyclanimines–morpholine derivatives with a bulky cage-type substituent
摘要:
Reductive amination of bicyclic cyanoketone 3 with benzylamine 5a provided morpholino-azahomotricyclanimine 6a. The crystal structure of cage compound 6a is reported. The dynamics of morpholine in 6a, in the debenzylated product 6b/8 and in the amidinium salt 7a were investigated and compared with those in a bicyclic amidino analogue 14. The different and partial unexpected results were interpreted by studying the cyclopropane-morpholine rotation in 6b and 14 by molecular modeling and the C(2)-amino rotation in aminoacetamidine 15 by ab initio calculation. (C) 1999 Elsevier Science B.V. All rights reserved.