ATROPISOMERISM IN ARYL-SUBSTITUTED BORAZINES
ATROPISOMERISM IN ARYL-SUBSTITUTED BORAZINES
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DOI：
10.1021/ic00210a011
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发表时间：
1985-01-01
影响因子：
4.6
通讯作者：
FRANGE, B
中科院分区：
文献类型：
--
作者：
ALLAOUD, S;FRANGE, B
合成了A '，AT'，Ar”-三邻甲苯基环硼嗪（o-CH_3C_6 H_4 NBX）_3（X= Cl，Br，Me，Et），并用~（13）C NMR对其进行了研究。CH_3 MgI与B，B '，B”-三氯-A'，A“，A”“-三邻甲苯基环硼氮烷（X= Cl）在乙醚中反应生成的甲基衍生物（X= Me）是单独的顺式异构体与已鉴定的B-羟基副产物的混合物。由于空间原因，该甲基化反应未能提供预期的反式异构体：相反，在水解步骤期间出现B-羟基化合物。
The A’, AT', Ar"-tri-o-tolylborazines (o-CH3C6H4NBX) 3 (X= Cl, Br, Me, Et) were prepared and studied by means of and 13C NMR. The methyl derivative (X= Me) resulting from the reaction of CH3MgI on the B, B', B"-trichloro-A’, A'', A'"-tri-o-tolyl-borazine (X= Cl) in diethyl ether was shown to bea mixture of the cis isomer alone with B-hydroxy byproducts that were identified. This methylation reaction fails to provide the expected trans isomer for steric reasons: instead, B-hydroxy compounds appear during the hydrolysis step.