Annulated butanolides by ring closing metathesis of diallyltetronic acid derivatives
作者:Rainer Schobert、Juan Manuel Urbina-González
DOI:10.1016/j.tetlet.2005.03.152
日期:2005.5
3,3-Diallyldihydrofuran-2,4-diones 5 with two identical allyl residues were obtained by Tsuji-Trost-type Pd-catalysed allylation of either 4-O-allyltetronates or 3-allyltetronic acids. Allylation of sodium 3-allyltetronate with a second allyl acetate gave mixed derivatives 5 as did the Claisen rearrangement of 4-O-allyl 3-allyltetronates 6 under microwave conditions. Compounds 5 and 6 were converted to butanolides with 3,3-spirocyclopentenyl or 3,4-cycloalkanyl annulation by ring closing metathesis with Grubbs catalysts. (c) 2005 Elsevier Ltd. All rights reserved.
Kotha, Sambasivarao; Deb, Ashoke Chandra, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2008, vol. 47, # 7, p. 1120 - 1134
作者:Kotha, Sambasivarao、Deb, Ashoke Chandra
DOI:——
日期:——
Spiro-annulation of barbituric acid derivatives and its analogs by ring-closing metathesis reaction
Barbituric acid 1 and related beta-dicarbonyl compounds were dialkenylated under the phase-transfer catalyst [e.g,, benzyltriethylammonium chloride (BTEAC)] conditions to generate the diallylated products. These diallylated products were subjected to the ring-closing metathesis (RCM) reaction to deliver the corresponding spiro-annulated derivatives. (C) 2005 Elsevier Ltd. All rights reserved.
MOMOSE, TAKEFUMI;TOYOOKA, NAOKI;FUJII, HIROMI;YANAGINO, HIRONOBU, HETEROCYCLES, 29,(1989) N, C. 453-458