Reaction of propenylbenzene derivatives and their analogs. I. Reaction of N,N-dibromobenzenesulfonamide with propenylbenzene derivatives.
作者:TAEKO ADACHI、KAZUO OTSUKI
DOI:10.1248/cpb.24.2803
日期:——
N, N-Dibromobenzenesulfonamide (II) was reacted with propenylbenzene (Ib), p-methoxypropenylbenzene (Ic), m-methoxypropenylbenzene (Id), 3, 4-dimethoxypropenylbenzene (Ie), and 4-benzyloxy-3-methoxypropenylbenzene (If), in various molar ratios in dichloromethane. 1-Benzenesulfonamido-2-bromo-1-phenylpropane (IIIb), 1-benzenesulfonamido-2-bromo-1-(4'-methoxyphenyl) propane (IIIc), 3'-bromo-substituted analog of IIIc (IVc), 1-benzenesulfonamido-2-bromo-1-(3'-methoxyphenyl) propane (IIId), 6'-bromo-substituted analog of IIId (IVd), 1-benzenesulfonamido-2-bromo-1-(3', 4'-dimethoxyphenyl) propane (IIIe), 6'-bromo-substituted analog of IIIe (IVe), N-benzenesulfonyl-3, 4-dimethoxyaniline (V'e), 6-bromo-substituted analog of V'e (Ve), 1-benzenesulfonamido-2-bromo-1-(4'-benzyloxy-6'-bromo-3'-methoxyphenyl) propane (IVf), and N-benzenesulfonyl-6-bromo-4-benzyloxy-3-methoxyaniline (Vf) were produced as main products, respectively. Formation of the side-chain eliminated compounds (such as V'e, Ve, and Vf) has been found when reacted in a ratio of I : II of less than 1 : 1, starting from 3, 4-dialkoxypropenylbenzene, and the sulfonamido group substituted in the position from which the side chain was eliminated.
N,N-二溴苯磺酰胺(II)与丙烯基苯(Ib)、对甲氧基丙烯基苯(Ic)、间甲氧基丙烯基苯(Id)、3,4-二甲氧基丙烯基苯(Ie)和4-苄氧基-3-甲氧基丙烯基苯(If)在二氯甲烷中以不同的摩尔比反应。生成了1-苯磺酰氨基-2-溴-1-苯基丙烷(IIIb)、1-苯磺酰氨基-2-溴-1-(4'-甲氧基苯基)丙烷(IIIc)、3'-溴取代的IIIc类似物(IVc)、1-苯磺酰氨基-2-溴-1-(3'-甲氧基苯基)丙烷(IIId)、6'-溴取代的IIId类似物(IVd)、1-苯磺酰氨基-2-溴-1-(3',4'-二甲氧基苯基)丙烷(IIIe)、6'-溴取代的IIIe类似物(IVe)、N-苯磺酰基-3,4-二甲氧基苯胺(V'e)、6-溴取代的V'e类似物(Ve)、1-苯磺酰氨基-2-溴-1-(4'-苄氧基-6'-溴-3'-甲氧基苯基)丙烷(IVf)和N-苯磺酰基-6-溴-4-苄氧基-3-甲氧基苯胺(Vf)分别作为主要产物。发现在I与II的摩尔比小于1:1时,从3,4-二烷氧基丙烯基苯开始反应,生成侧链消除的化合物(如V'e、Ve和Vf),并且磺酰氨基团取代了侧链消除的位置。