Oxidation of Deactivated Cage Substrates in the System
H2SO4–HNO3
作者:E. A. Ivleva、I. S. Grinʼ、I. S. Uchaev、Yu. N. Klimochkin
DOI:10.1134/s1070428020030082
日期:2020.3
the adamantane series in the system H2SO4–HNO3 have been studied, and the effective rate constants have been determined. The reaction is described by the pseudo-first-order kinetic equation. The primary kinetic isotope effect has been estimated at 2.9±0.3. The rate-determining step of the oxidation process is cleavage of the adamantane C–H bond. The presence of an ethyl group at the bridgehead position
摘要研究了H 2 SO 4 -HNO 3体系中16种金刚烷系列羧酸酯的氧化动力学 ,并确定了有效的速率常数。该反应由拟一级动力学方程式描述。初步的动力学同位素效应估计为2.9±0.3。氧化过程的决定速率的步骤是金刚烷CH键的断裂。在桥头位置存在乙基会增加金刚烷底物对氧化的反应性,而甲基,乙氧羰基和乙氧羰基甲基会降低反应性。
ADAMANTANE DERIVATIVES AND PROCESS FOR PRODUCING THEM
申请人:Daicel Chemical Industries, Ltd.
公开号:EP0927711A1
公开(公告)日:1999-07-07
In the presence of an imide compound (e.g., N-hydroxyphthalimide) shown by the formula (2):
wherein R1 and R2 independently represents a hydrogen atom, a halogen atom, an alkyl group, an aryl group, a cycloalkyl group; or R1 and R2 may bond together to form a double bond or an aromatic or non-aromatic ring; Y is O or OH and n = 1 to 3;
or the imide compound and a co-catalyst (e.g., a transition metal compound), an adamantane derivative having a functional group such as a nitro group, an amino group, a hydroxyl group, a carboxyl group, a hydroxymethyl group and an isocyanato group is oxidized with oxygen. According to the above method, an adamantane derivative having a hydroxyl group together with a functional group such as a nitro group, an amino group, a hydroxyl group, a carboxyl group, a hydroxymethyl group and an isocyanato group is efficiently obtained.
Linear Free Energy Relationship Studies of the Dimethyldioxirane C-H Bond Insertion Reaction
作者:Robert W. Murray、Hong Gu
DOI:10.1021/jo00122a059
日期:1995.9
The relative rates of reaction of a series of p-substituted cumenes with dimethyldioxrane have been studied. The products are the corresponding cumyl alcohols. Treatment of the rate data with the Hammett substituent constants reveals that the insertion reaction is an electrophilic process with rho = -2.76. Similar treatment of the data with the Brown-Okamoto substituent constants gives rho(+) = -1.61. The second-order rate constants for the reaction of a series of substituted adamantanes with dimethyldioxirane were also determined. Again, the products are the corresponding adamantanols. The rate constants were correlated with several types of substituent constants. The best correlations were obtained with the Taft sigma(*) and sigma(I) constants which gave rho(*) = -1.08 and rho(I) -2.39, respectively. Thus, the insertion reaction in this aliphatic system is also electrophilic.