Enantiospecific First Total Synthesis of ent-Allothapsenol
摘要:
The enantiospecific first total synthesis of the enantiomer of the irregular sesquiterpene from Ligusticumgrayi allothapsenol, starting from the readily available monoterpene (R)-carvone, is described, which confirmed the assumed absolute configuration of the natural product.
Synthesis of chiral bicyclo[4.3.1]decanes via an intramolecular carbonyl ene-reaction
作者:A. Srikrishna、C. Dinesh、K. Anebouselvy
DOI:10.1016/s0040-4039(98)02518-0
日期:1999.1
Synthesis of chiral bicyclo[4.3.1]decanes via an intramolecular acid catalysed type II ene reaction of chiral (5-isopropenylcyclohex-2-enyl)acetaldehydes derived from (R)-carvone is described.
A novel boron trifluoride etherate mediated deep-seated rearrangement of an α,β-epoxyketone
作者:Adusumilli Srikrishna、Sripada S.V. Ramasastry
DOI:10.1016/j.tetasy.2005.07.030
日期:2005.9
of carvone epoxide 2 resulted in dimeric products 3 and 4, in contrast to the expected ring contraction product. Reaction of β-methylcarvone epoxides 8 and 11 with acids furnished 2-acetyl-4-isopropenylcyclopentanones 9 and 14 containing a stereodefined quaternary carbon atom. On the other hand, the reaction of epoxides 8 and 11 with borontrifluorideetherate lacks the stereoselectivity and in addition
Two enantiospecific routes to (+)-valerane starting from (R)-carvone, using a combination of Claisen rearrangement and intramolecular diazo ketone cyclopropanation reactions for the stereoselective generation of the vicinalstereogenicquaternarycarbonatoms, are described. Thus, orthoester Claisen rearrangement of 3-methylcarveol 6 furnishes the ester 9 containing the first quaternarycarbon atom
Srikrishna; Dinesh, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2000, vol. 39, # 5, p. 323 - 325
作者:Srikrishna、Dinesh
DOI:——
日期:——
Srikrishna; Praveen Kumar; Jagadeeswar Reddy, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2005, vol. 44, # 7, p. 1430 - 1436