Abstract
1. In the mass spectra of carbomethoxyl derivatives of cyclopropylthiophene, intense ion peaks are observed, corresponding to successive elimination of MeO and COOMe radicals and the neutral fragments MeOH, HCOOMe, and CO from M+., so that the number of carbomethoxyl substituents in CPR can be determined. 2. Mono- and gem-dicarbomethoxyl derivatives of cyclopropylthiophenes are characterized by rearrangements of M+. with migration of the MeO groups to the carbon atom adjacent to the thiophene ring. The presence of a methyl substituent at this carbon atom hinders this rearrangement. 3. For the monocarbomethoxyl derivatives of cyclopropylthiophenes under electron impact, a splitting off of the methyl substituent of the ester groups is observed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Bulletin of the Academy of Sciences of the USSR Division of Chemical Science
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
