Synthesis and absolute stereochemistry of hagen's-gland lactones in some parasitic wasps (Hymenoptera:Braconidae)
作者:Gregory C. Paddon-Jones、Christopher J. Moore、Douglas J. Brecknell、Wilfried A. König、William Kitching
DOI:10.1016/s0040-4039(97)00661-8
日期:1997.5
Efficient syntheses and enantioselective gas chromatography have confirmed the structures and established the absolute stereochemistry of some novel bicyclic lactones (tetrahydrofurofuranones) in species of parasitic wasps (Hymenoptera:Braconidae). The co-occurring γ-lactones, octan-4-olide and dodecan-4-olide, have the (R)-configuration.
1,3-Asymmetric induction in the intramolecular [2+2] cycloaddition of alkene-keteniminium salts. Synthesis of (+)-gibberellic acid key intermediate
作者:Pil-Jong Shim、Hee-Doo Kim
DOI:10.1016/s0040-4039(98)02228-x
日期:1998.12
Optically active bicyclo[4.2.0]octan-7-ones were synthesized by stereoselective intramolecular [2+2] cycloaddition of alkene-keteniminium salt derived from L-glutamic acid, based on 1,3-asymmetric induction. Synthetic application toward (+)-gibberellic acid key intermediate was also described.
Absolute configuration of eldanolide, the wing gland pheromone of the male African sugar cane borer, Eldana saccharina (Wlk.) syntheses of its (+) and (−) enantiomers.
A synthetic approach to the pseudopterosins using cascade technology
作者:David C. Harrowven、Shelagh T. Dennison、Peter Howes
DOI:10.1016/s0040-4039(00)73163-7
日期:1994.6
A rapid synthetic entry towards the pseudopterosins, a class of diterpenes which display potent anti-inflammatory and analgesic properties, is described. The key feature of this approach is the use of a sequential intramolecular, Lewis acid mediated Friedel-Crafts alkylation - Friedel-Crafts acylation sequence, viz 14 to 15, to establish the tricyclic carbon framework.
Pirillo, D.; Vercesi, D.; Azzolina, O., Farmaco, Edizione Scientifica, 1987, vol. 42, # 2, p. 111 - 116
作者:Pirillo, D.、Vercesi, D.、Azzolina, O.、Traverso, G.