<b>Small-Ring Compounds. XXXVI. 3-Methylenecyclobutyl Bromide and 1-Methylcyclobut-2-enyl Bromide</b>
作者:Edgar F. Kiefer、John D. Roberts
DOI:10.1021/ja00864a021
日期:1962.3
3-Methylenecyclobutyl bromide and 1-methylcyclobut-2-enyl bromide have been synthesized from the cycloaddition products of allene with acrylonitrile and vinyl benzoate. The rate constants for solvolysis of the two bromides in aqueousethanol have been determined and correlated with the solvolysis rates of a series of analogous bromides. 1-Methylcyclobut-2-enyl bromide appears to exhibit some rate enhancement
Small-Ring Compounds. XV. Methylenecyclobutene and Related Substances<sup>1</sup>
作者:Douglas E. Applequist、John D. Roberts
DOI:10.1021/ja01597a040
日期:1956.8
Methylenecyclobutene has been synthesized from diethylmethylenemalonate by way of 3-methylenecyclobutanecarboxylic acid and 3-rnethylenecyclobutylamine. The synthesis featured the use of anthracene as a blocking group for the exocyclic double bond during malonic-ester closure of the cyclobutane ring. 4,4-Dimethyl-3-methylenecyclobutene has been obtained by degradation of α-pinene and 1-phenyl-3-methylenecyclobutene