A new cascade reaction including formal [5 + 2] cycloaddition was developed. Treatment of homocinnamyl alcohol and Co2(CO)6-complexed arylpropynal with BF3·OEt2 resulted in the generation of hydrobenzocycloheptafuran having an alkyne-Co2(CO)6 complex. The reaction consists of 5-membered ring selective Prins cyclization and subsequent Friedel-Crafts cyclization. The cascade reaction was applied to a
Deaminative Arylation of Amino Acid-derived Pyridinium Salts
作者:Megan E. Hoerrner、Kristen M. Baker、Corey H. Basch、Earl M. Bampo、Mary P. Watson
DOI:10.1021/acs.orglett.9b02643
日期:2019.9.20
A Suzuki–Miyaura cross-coupling of α-pyridinium esters and arylboroxines has been developed. Combined with formation of the pyridiniumsalts from amino acid derivatives, this method enables amino acid derivatives to be efficiently transformed into α-aryl esters and amides. Under the mild conditions, broad functional group tolerance on both the amino acid derivatives and the arylboroxine are observed