Restricted Rotation Involving the Tetrahedral Carbon. XXXVI. Stereodynamics of 9-(2-MethylbenzyI)triptycene Derivatives
作者:Gaku Yamamoto、Michinori Oki
DOI:10.1246/bcsj.54.481
日期:1981.2
DNMR study of a series of singly peri-substituted 9-(2-methylbenzyl)triptycene derivatives showed that the interconversion among the ap and ±sc rotamers with the o-methyl group pointing outside the triptycyl skeleton occurs by two consecutive gear motion steps by way of the unstable rotamers with the o-methyl group pointing inside. The+sc\ightleftharpoons−sc interconversion barriers (13.2—14.1 kcal/mol) are lower than the ap\ightleftharpoons±sc ones (17.7–20.8 kcal/ mol). The aryl group passes over a peri-hydrogen at the transition state of the former process and over the peri-substituent in the latter.
Reduction of 1-substituted anthraquinones to 1- and 4-substituted anthrones
作者:V. A. Loskutov
DOI:10.1007/bf02494377
日期:1997.2
The regioselectivity of reduction of 1-substituted anthraquinones to 1- or 4-substituted anthrones is determined by both the nature of the substituent and the type of the reducing system used.
1-取代蒽醌还原为1-或4-取代蒽酮的区域选择性由取代基的性质和所用还原系统的类型决定。
Reactivities of Stable Rotamers. XXXV. Diazotization of 2-(1,4-Dimethyl-9-triptycyl)-2-methylpropylamine Rotamers
The title amine rotamers were prepared from the corresponding carboxylic acids and were diazotized with isopentyl nitrite in the presence of acetic acid in benzene. The ap rotamer affords, as main products, olefins that are derived by deprotonation after rearrangement of the intervening carbocation and small amounts each of the corresponding acetate and a cyclized product, both of which are derived
9-Anthryloxyaminoalkanes and related compounds, processes for their preparation and pharmaceutical compositions containing them
申请人:SYNTEX (U.S.A.) INC.
公开号:EP0132351A2
公开(公告)日:1985-01-30
Compounds useful for treating inflammation, pain and swelling, represented by the formula:
and the pharmaceutically acceptable acid addition salts thereof, wherein:
Y and Z are each independently halo, alkyl or alkoxy;
I and m are each independently 0 or an integer of 1-4;
b is an integer of 2-12; and
X is selected from:
in which
R1 and R2 are independently H, alcyl or cycloalkyl;
R3 is H, alkyl or CH2CH20H; and
n is an integer of 3-7.
用于治疗炎症、疼痛和肿胀的化合物,由式:
及其药学上可接受的酸加成盐,其中
Y 和 Z 各自独立地为卤代、烷基或烷氧基;
I 和 m 各自独立地为 0 或 1-4 的整数;
b 是 2-12 的整数;以及
X 选自
其中
R1 和 R2 独立地为 H、烷基或环烷基;
R3 是 H、烷基或 CH2CH20H;以及
n 是 3-7 的整数。
Isobenzofuran-aryne cycloadducts: formation and regioselective conversion to anthrones and substituted polycyclic aromatics