A novel synthesis of dihydropyrimidothienopyridazine derivatives
摘要:
Aza-Wittig reaction of iminophosphorane 3, derived from 5-amino-3,4-diphenylthieno[2,3-c]piridazine-6-carboxaldehyde (1), with isocyanates, followed by intramolecular hetero conjugate addition annulation after addition of an amine, gives the functionalized 7,8-dihydropyrimido[4',5':4,5]-thieno[2,3-c]piridazines 6 and 7. (C) 1998 Elsevier Science Ltd. All rights reserved.
A novel synthesis of dihydropyrimidothienopyridazine derivatives
摘要:
Aza-Wittig reaction of iminophosphorane 3, derived from 5-amino-3,4-diphenylthieno[2,3-c]piridazine-6-carboxaldehyde (1), with isocyanates, followed by intramolecular hetero conjugate addition annulation after addition of an amine, gives the functionalized 7,8-dihydropyrimido[4',5':4,5]-thieno[2,3-c]piridazines 6 and 7. (C) 1998 Elsevier Science Ltd. All rights reserved.
Aza-Wittig reaction of iminophosphorane 3, derived from 5-amino-3,4-diphenylthieno[2,3-c]piridazine-6-carboxaldehyde (1), with isocyanates, followed by intramolecular hetero conjugate addition annulation after addition of an amine, gives the functionalized 7,8-dihydropyrimido[4',5':4,5]-thieno[2,3-c]piridazines 6 and 7. (C) 1998 Elsevier Science Ltd. All rights reserved.