Studies on Seven-membered Ring Compounds. XX. Reactions of Troponeimine Derivatives. (2)
作者:Hideo Nakao、Nobuo Soma、Genshun Sunagawa
DOI:10.1248/cpb.13.828
日期:——
The reaction of 2-methoxytroponeimine (I) and its N-methyl derivative (II) with active methylene compounds were carried out. The reaction of I with malononitrile, ethyl cyanoacetate or cyanoacetamide in the presence of sodium ethoxide afforded rearrangemet products, that is 3-phenylacrylic acid derivatives. The same reaction in the absence of sodium ethoxide gave mainly 2-imino-1, 2-dihydrocyclohepta[b]pyrrole derivatives. However, the reaction of I with diethyl malonate afforded ethyl 2-oxo-8-methoxy-1, 2-dihydrocyclohepta[b]pyrrole-3-carboxylate. II showed some different reactivity from I. Namely, the reaction of II with active methylene compounds in the presence of sodium ethoxide afforded 2-imino-1, 2-dihydrocyclohepta[b]pyrrole derivatives besides rearrangement products.
Conductive Salts of Tropylium Ions with Tetracyanoquinodimethan Anion Radical (TCNQ<sup>\ewdot</sup>) and Bisthiadiazolotetracyanoquinodimethan Anion Radical (BTDA–TCNQ<sup>\ewdot</sup>)
Tropylium ions have been found to be good cations for forming highly conductive salts of TCNQ\ewdot. Tropylium ions with different reduction potentials were prepared. The first reduction potentials which are correlated with the substituent constants σp+ control the formation of the salts. The cations with higher reduction potentials underwent a reaction with TCNQ\ewdot to give neutral TCNQ and coupling