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芐基鹵化物在鈀試劑作用下與氨甲酰基硅烷的交叉偶聯(lián)反應(yīng)碩士論-文庫吧

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【正文】 of the two kinds of reactions. Under these conditions, we carry on the experiment that are carbamoylsilanes with allylic under catalysis by tetrakis(triphenylphosphine)palladium(0), bis(tritertbutylphosphine)palladium(0) and bis(triphenylphosphine)palladium V 山西師范大學(xué)學(xué)位論文 (II). Also, we have investigated the influence of palladium catalyst and the steric and electronic effects on reaction time and yield. The reaction with benzyl chloride 8。 ofluorobenzylchloride 9。 pfluorobenzylchloride 10。 ochlorobenzylchloride 11。 mchlorobenzylchloride 12。 pchlorobenzylchloride 13。 ocyanbenzylchloride 14。 mcyanbenzylchloride 15。 pcyanbenzylchloride 16。 omethylbenzylchloride 17。 mmethylbenzylchloride 18。 pmethylbenzylchloride 19。 pmethoxylbenzylchloride 20。 2,4dichlorobenzylchloride 21。 3,4dichlorobenzylchloride 22。 2,6dichlorobenzylchloride 23。 pnitrylbenzylchloride 24。 chlorodiphenylmethane 25。 cinnamylchloride 26。 1(chloromethyl)naphthalene 27 in the presence of three palladium plexes. Among these reaction 2,6dichlorobenzylchloride 23。 pnitrylbenzylchloride 24。 chlorodiphenylmethane 25 not action, other products are NmethylN(methoxymethyl)benzethylamide 28。 (2fluoro)NmethylN(methoxymethyl)benzethylamide 29。 (4fluoro)NmethylN(methoxymethyl)behylamide 30。 (2chloro)NmethylN(methoxymethyl)benzethylamide 31。 (3chloro)NmethylN(methoxymethyl)benzethylamide 32。 (4chloro)NmethylN(methoxymethyl)benzethylamide 33。 (2cyan)NmethylN(methoxymethyl)benzethylamide 34。 (3cyan)NmethylN(methoxymethyl)benzethylamide 35。 (4cyan)NmethylN(methoxymethyl)benzethylamide 36。 (2methyl)NmethylN(methoxymethyl)benzethylamide 37。 (3methyl)NmethylN(methoxymethyl)benzethylamide 38。 (4methyl)NmethylN(methoxymethyl)benzethylamide 39。 (4methoxyl)NmethylN(methoxymethyl)benzethylamide 40。 (2,4dichloro)NmethylN(methoxymethyl)benzethylamide 41。 (3,4dichloro)NmethylN(methoxymethyl)benzethylamide 42。 4benzethyl3butenylNmethylN(methoxymethyl)benztertiaryamide 46。 1napht VI Absteact haleneNmethylN(methoxymethyl)benztertiaryamide 47. Comparing three kinds of results of catalysts we know: [(Ph)3P]4Pd (0) can improve reactivity connected with electrondonating groups on the benzene ring。 [(Ph)3P]2PdCl2 (ii) enhances even the reaction of the electronwithdrawing Group on the benzene ring of reactivity。 [(tBu)3P]2Pd (0) alone on the reactivity of the benzene ring connected with CN39。s response. From the experimental results, we will find: when the electronpushing on the benzene ring, reactivity increases。 Even when there are electronwithdrawing, the opposite。 When on the benzene ring orthosubstituent is attached, reactivity incresses。 Even when there is a substituent, it has little effect on the reaction. Reaction between two substituents on the benzene ring is not a satisfactory situation, and may be affected by the bined effects of steric and inductive effect. Although the NmethylNoxymethylcarbamylsilane and a series of chloride benzyls under the Palladium catalyzed coupling reactions can occur, the yield is not very high. NmethylN(2benzethyl)benzethylcarbamoylsilane reaction with benzyl chloride 8。 ofluorobenzylchloride 9。 pfluorobenzylchloride 10。 ochlorobenzylchloride 11。 mchlorobenzylchloride 12。 pchlorobenzylchloride 13。 ocyanbenzylchloride 14。 mcyanbenzylchloride 15。 pcyanbenzylchloride 16。 omethylbenzylchloride 17。 mmethylbenzylchloride 18。 pmethylbenzylchloride 19。 pmethoxylbenzylchloride 20。 2,4dichlorobenzylchloride 21。 3,4dichlorobenzylchloride 22。 2,6dichlorobenzylchloride 23。 pnitrylbenzylchloride 24。 chlorodiphenylmethane 25。 cinnamylchloride 26。 1(chloromethyl)naphthalene 27 in the presence of tetrakis(triphenylphosphine)palladium(0). Among these reaction 2,6dichlorobenzylchloride 23。 pnitrylbenzylchloride 24。 VII 山西師范大學(xué)學(xué)位論文 chlorodiphenylmethane 25 do not act, other products are NmethylN(2benzethyl)benzethylamide 49。 (2fluoro)NmethylN(2benzethyl)benzethylamide 50。 (4fluoro)NmethylN(2benzethyl)benzethylamide 51。 (2chloro)NmethylN(2 benzethyl)benzethylamide 52。 (3chloro)NmethylN(2benzethyl)benzethylamide 53。 (4chloro)NmethylN(2benzethyl)benzethylamide 54。 (2cyan)NmethylN(2benzethyl)benzethylamide 55。 (3cyan)NmethylN(2benzethyl)benzethylamide 56。 (4cyan)NmethylN(2benzethyl)benzethylamide 57。 (2methyl)NmethylN(2benzethyl)benzethylamide 58。 (3methyl)NmethylN(2benzethyl)benzethylamide 59。 (4methyl)NmethylN(2benzethyl)benzethylamide 60。 (4methoxyl)NmethylN(2benzethyl) benzethylamide 61。 (2,4dichloro)NmethylN(2benzethyl)benzethylamide 62。 (3,4dichloro)NmethylN(2benzethyl)benzethylamide 63。 4benzethyl3butenylNmethylN(2benzethyl)benztertiaryamide 67。 1naphthaleneNmethylN(2benzethyl)benztertiaryamide 68. Results of this series of reactions are similar to previous experiments, but there are some differences: when on the benzene ring connected with electron withdrawing groups such as halogens, cyanogen radicals have a longer reaction time and yield decreased。 but if the halogen, cyano, methoxymethyl and other electronwithdrawing attached to the benzene ring, the yield is very high. When on the benzene connected with electron donating groups such as methyl, cinnamyl radicals, and naphthalene can substantially increase the reactivity of not only shorten the reaction time, but the product yields are high。 when there are two substituents on the benzene ring, reactivity is restraint, even not react. In a word, through this research, 17 secondary amide p VIII Absteact ounds and 17 tertiary amide pounds are synthesized. Estab
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