1350705-81-5Relevant articles and documents
Enantioselective total syntheses and determination of absolute configuration of marine toxins, oxazinins
Dethe, Dattatraya H.,Ranjan, Alok
, p. 23692 - 23703 (2013)
The enantioselective total syntheses of natural marine toxins, oxazinin-1, -2, -4, -5, -6 and linear precursor preoxazinin-7 are described. The synthetic highlights include Sharpless asymmetric aminohydroxylation and dihydroxylation, oxa-Michael reaction and intramolecular diastereoselective addition of an appropriate hydroxyl substituent to a 3-methyleneindolenine for the construction of the morpholine ring as key steps. The synthetic route also allowed the synthesis of the epi-preoxazinin and a structurally related secondary metabolite bursatellin isolated in 1980 from sea hare Bursatella leachii pleii and its epimer.
Asymmetric first total syntheses and assignment of absolute configuration of oxazinin-5, oxazinin-6 and preoxazinin-7
Dethe, Dattatraya H.,Ranjan, Alok,Pardeshi, Vijendra H.
, p. 7990 - 7992 (2012/01/04)
Asymmetric first total syntheses of the unprecedented toxins oxazinin-5, oxazinin-6 and preoxazinin-7 have been achieved from a common key intermediate 18, derived from a regiocontrolled Sharpless asymmetric aminohydroxylation and oxa-Michael reaction, which in addition to confirming the structure also established the absolute configuration of the natural products. On the way an expeditious synthesis of a metabolite bursatellin was completed in 8 steps. The Royal Society of Chemistry 2011.