作者:Benedetta Maggio、Giuseppe Daidone、Demetrio Raffa、Salvatore Plescia、Gabriella Bombieri、Fiorella Meneghetti
DOI:10.1002/hlca.200590161
日期:2005.8
The diazonium salt derived from 4-amino-N,1,3-trimethyl-N-(3-methyl-1-phenyl-1H-pyrazol-5-yl)-1H-pyrazole-5-carboxamide (14) was reacted with a mixture of CuSO4 and NaCl, with ascorbic acid as an initiator to afford the planar derivative 4,6-dihydro-1,4,6,8-tetramethyl-3-phenyldipyrazolo[3,4-b:4′,3′-d]pyridin-5(3H)-one (16) and its unexpected isomer 4,6-dihydro-3,4,6,8-tetramethyl-1-phenyldipyrazolo[4
从4-氨基-衍生的重氮盐Ñ,1,3-三甲基- ñ - (3-甲基-1-苯基-1- ħ -1H-吡唑-5-基)-1- ħ(吡唑-5-甲酰胺14)为与CuSO 4和NaCl的混合物,以抗坏血酸为引发剂反应,得到平面衍生物4,6-二氢-1,4,6,8-四甲基-3-苯基二吡唑并[3,4- b:4', 3′ - d ]吡啶5-5 (3 H)-1 (16)及其意外的异构体4,6-二氢-3,4,6,8-四甲基-1-苯基二吡唑并[4,3- b:4', 3'- d ] pyridin-5(1 H)-one(17)以及差向异构体(3 S,4 S)-(或(3 S,4 R)-)和(3 S,4 R)-(或(3 S,4 S)-)4-氯-2,4-二氢-1',3 ',5,5'-四甲基-2-苯基螺[吡唑3,4' - (1' ħ) -吡咯并[3,4- c ^ ]吡唑] -6'(5' H ^) -酮(18A和b,分别)。将差向