Abstract
The phosphatriafulvenes 1a,b - phosphaalkenes with inverse electron density - react primarily at the three-membered ring with nucleophilic reagents. From their reactions with organolithium compounds 2a-c and Grignard reagents 5a,b the cyclopropenylphosphines 4a-f are obtained after addition of chlorotrimethylsilane; of these products only 4a, d, and e were isolated and characterized. Methanolysis of products 4a-f yields the primary ( 7a-d) and secondary phosphines ( 9a,b) via cleavage of the PSi bond. Compound 1b reacts with the ynamines 10a,b through cleavage of the three-membered ring to yield the 1-phospha-1,3,5-hexadienynes 11a (X-ray structure) and 11b. The same phosphatriafulvene reacts with the cyclobutadienes 17a,b to furnish initially the 2-phosphabicyclohexenes 18a,b which, on stirring in chloroform at room temperature, undergo [2 + 2] cycloreversion to give the open-chain isomers 20a,b.
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 callDisclaimer: 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.
