Steric Hindrance Tuned [4 + 1] Annulation of α-Substituted Conjugated Enones with Ylides for Dihydrofuran Synthesis.
Sign Up to like & getrecommendations! Published in 2024 at "Organic letters"
DOI: 10.1021/acs.orglett.4c03930
Abstract: In sharp contrast to the intuitive modulation by the electronic effect, the [4 + 1] annulation reaction between α-substituted conjugated enones and ylides has been reliably controlled by the match of the α-substituent and the… read more here.
Keywords: annulation; substituted conjugated; conjugated enones; steric hindrance ... See more keywords
One-pot synthesis of multi-substituted conjugated dienones by trapping allene carbocations with active ylides.
Sign Up to like & getrecommendations! Published in 2022 at "Chemical communications"
DOI: 10.1039/d1cc06405c
Abstract: A Rh(II)/boron reagent co-catalyzed unprecedent transformation was established for the rapid construction of multi-substituted conjugated dienones under mild conditions by trapping allene carbocations with oxonium ylides from simple starting points in yields up to 85%.… read more here.
Keywords: trapping allene; allene carbocations; substituted conjugated; one pot ... See more keywords
Highly selective cross-coupling reactions of 1,1-dibromoethylenes with alkynylaluminums for the synthesis of aryl substituted conjugated enediynes and unsymmetrical 1,3-diynes
Sign Up to like & getrecommendations! Published in 2022 at "RSC Advances"
DOI: 10.1039/d2ra02127g
Abstract: A highly efficient method for the synthesis of aryl substituted conjugated enediynes and unsymmetrical 1,3-diynes via selective cross-coupling reactions of 1,1-dibromoethylenes with alkynylaluminums using the Pd(OAc)2–DPPE and Pd2(dba)3–TFP complexes as catalysts, respectively, has been successfully… read more here.
Keywords: conjugated enediynes; substituted conjugated; enediynes unsymmetrical; synthesis aryl ... See more keywords