Reactivity and crystal structure of 10,11 -dihdro-10,11-epoxy-5H-dibenzo[a,d]cycloheptene. A comparison with cis-stilbene oxide
作者:Giuseppe Bellucci、Cinzia Chiappe、F. Marioni、Riccardo Spagna
DOI:10.1039/p29900002147
日期:——
The kinetics and product distributions for the HClO4 catalysed hydrolysis of 10,11-diydro-10,11-epoxy-5H-dibenzo[a,d]cycloheptene1 and of cis-stilbene oxide 6 in tetrahydrofuran–water (8:2), have been investigated by HPLC. The former epoxide gives 9,10-dihydroanthracene-9-carbaldehyde 4 and the trans- and cis-10,11-dihydro-5H-dibenzo[a,d]cycloheptene-10,11-diols, 2 and 3, in he ratio 6:6:1. cis-Stilbene
为高氯酸的动力学和产品分布4 10,11- diydro -10,11-环氧-5-催化水解ħ -二苯并[一,d ]环庚烯1,并且顺式-茋氧化物6在四氢呋喃-水(8:2 ),已通过HPLC进行了研究。前者环氧化物使9,10-二氢-9-甲醛4和反式-和顺-10,11-二氢-5- ħ -二苯并[一,d ]环庚烯-10,11-二醇,2和3,在他比例6:6:1。顺式-氧化二苯乙烯与速率常数ca反应。低十倍,得到大部分(±)-1,2-二苯乙烷-1,2-二醇。这些差异可以用1的晶体结构来解释,该晶体结构由于C(10)和C(11)处键角的增大而显示出相当大的环应变。这种结构也为1相对于6的微粒体环氧化物水解酶催化的水合速率低得多提供了一种解释。