16091-70-6Relevant articles and documents
NEW POLYOXYGENATED STEROID GLYCOSIDES FROM THE DEFENCE GLANDS OF SEVERAL SPECIES OF CHRYSOLININA BEETLES (COLEOPTERA: CHRYSOMELIDAE)
Randoux, T.,Braekman, J. C.,Daloze, D.,Pasteels, J. M.,Riccio, R.
, p. 3879 - 3888 (1990)
The composition of the defence secretions of four species of Chrysolina beetles on feeding on St John's wort (Hypericum perforatum) has been investigated.In contrast with other members of this genus which produce cardiac glycosides these four species contain new polyoxygenated steroid glycosides.The structures of seven of these derivatives (3-9) have been determinated.
Amine and thiazole substituted γ-butyrolactones from naturally occurring limonene
Kaur, Pushpinder,Das, Pralay,Chaudhary, Abha,Singh, Bikram
experimental part, p. 639 - 644 (2011/11/13)
Substituted γ-butyrolactones are important structural motifs in several natural products and pharmaceuticals. In this paper, we report the synthesis of novel γ-butyrolactone amine and thiazole derivatives from naturally occurring limonene. Regioselective bromination followed by nucleophilic substitution with different amines and thiourea gave desired products in moderate yield.
THE ASYMMETRIC SYNTHESIS OF 4,4-DIMETHYL-3-SUBSTITUTED BUTYROLACTONES
Leznoff, Clifford C.,McArthur, Colin R.,Whittaker, Mark
, p. 225 - 232 (2007/10/02)
Chiral 4,4-dimethyl-3-phenyl and 3-(3-oxobutyl)butyrolactones have been prepared in high enantiomeric excesses by a mild acid catalysed cleavage and lactonisation of the Michael adducts obtained from asymmetric additions of isopropenyl magnesium bromide t
