Development of a New Catalyst for the Distannation of Alkynes
作者:Sascha Braune、Uli Kazmaier
DOI:10.1002/anie.200390102
日期:2003.1.20
Verlhac, Jean-Baptiste; Kwon, HeeAn; Pereyre, Michel, Journal of the Chemical Society. Perkin transactions I, 1993, # 13, p. 1367 - 1368
作者:Verlhac, Jean-Baptiste、Kwon, HeeAn、Pereyre, Michel
DOI:——
日期:——
Synthesis of the 2-Alkenyl-4-alkylidenebut-2-eno-4-lactone (=α-Alkenyl-γ-alkylidenebutenolide) Core Structure of the Carotenoid Pyrrhoxanthinvia the Regioselective Dihydroxylation of Hepta-2,4-diene-5-ynoic Acid Esters
作者:Joachim Schmidt-Leithoff、Reinhard Brückner
DOI:10.1002/hlca.200590149
日期:2005.7
A new strategy for the stereoselective synthesis of 4-alkylidenebut-2-eno-4-lactones (=γ-alkylidenebutenolides) with (Z)-configuration of the exocyclic CC bond at C(4) was developed. It is exemplified by the synthesis of 4-alkylidenebutenolactone 31 (Scheme 4), which constitutes a substructure of the carotenoidspyrrhoxanthin (1) and peridinin. The formation of the precursor 4-(1-hydroxyalkyl)butenolactone