Cycloaddition Reactions of Allenylphosphonates and Related Allenes with Dialkyl Acetylenedicarboxylates, 1,3-Diphenylisobenzofuran, and Anthracene
作者:K. V. Sajna、Ramesh Kotikalapudi、Manab Chakravarty、N. N. Bhuvan Kumar、K. C. Kumara Swamy
DOI:10.1021/jo102240u
日期:2011.2.4
opening of the [β,γ] carbon−carbon double bond of the allene is realized. In contrast to these, the reaction of allenylphosphonate (OCH2CMe2CH2O)P(O)(H)C═C═CMe2 possessing a terminal ═CMe2 group with DMAD occurs by both [2 + 2] cycloaddition and ene reaction. While the reaction of ═CH2 terminal allenylphosphonates as well as allenylphosphine oxides with 1,3-diphenylisobenzofuran afforded preferentially