The One-Pot Synthesis and Diels-Alder Reactivity of 2,5-Dihydrothiophene- 1,1-dioxide-3-carboxylic Acid
作者:Genara S. Andrade、Joachim E. Berkner、Charles L. Liotta、Charles Eckert、David A. Schiraldi、Arthur Andersen、David M. Collard
DOI:10.1081/scc-120024845
日期:2003.10
exclusively at the 3-position, using CO2 and DBU proceeds to >90% conversion. A rapid workup gives 3-sulfolene-3-carboxylic acid, a stable precursor to 1,3-butadiene-2-carboxylic acid. High conversions to Diels-Alder adducts were obtained upon treatment of 3-sulfolene-3-carboxylic acid with various dienophiles.
Rhodium(III)‐Catalyzed Heteroannulations of 3‐Sulfolene Derivatives through C(sp
<sup>2</sup>
)−H Activation: Access to Pyridine
<i>ortho</i>
‐Quinodimethane Precursors
作者:Tomas J. Saiegh、Christophe Meyer、Janine Cossy
DOI:10.1002/ejoc.202200509
日期:2022.6.13
Hydroxamates derived from 3-sulfolene-3-carboxylic acid, a yet unexplored class of alkenes in C(sp2)−H activation reactions, can be successfully involved in rhodium(III)-catalyzed intra- and intermolecular heteroannulations with alkynes leading to diversely substituted sulfolene-pyridones. Post-functionalization reactions allow access to sulfolene-pyridines which can serve as precursors of the corresponding