A highly stereoselective formal total synthesis of homogynolide-B the ketoketals and the ketospirolactone starting from Hagemann's ester is described.
描述了从Hagemann酯开始的高立体选择性形式的高乙内酰胺-B,酮基酮和酮螺内酯的全合成。
Stereocontrolled synthesis of (±)-α-pinguisene and (±)-pinguisenol
作者:Adusumilli Srikrishna、Dange Vijaykumar
DOI:10.1039/a705600a
日期:——
Total synthesis of (±)-α-pinguisene 1 and (±)-pinguisenol 2, employing an orthoester Claisen rearrangement and an intramolecular diazo ketone cyclopropanation reaction for the stereospecificconstruction of vicinalquaternarycarbonatoms, is described.
Srikrishna, Adusumilli; Vijaykumar, Dange, Journal of the Chemical Society. Perkin transactions I, 1999, # 10, p. 1265 - 1271
作者:Srikrishna, Adusumilli、Vijaykumar, Dange
DOI:——
日期:——
A formal total synthesis of (±)-homogynolide-B
作者:Adusumilli Srikrishna、Sankuratri Nagaraju、Somepalli Venkateswarlu、Uma S. Hiremath、T. Jagadeeswar Reddy、Paloth Venugopalan
DOI:10.1039/a903866c
日期:——
rearrangement of the allyl alcohol 16 and 2-methoxypropene in the presence of a catalytic amount of propionic acid afforded a 3∶2 epimeric mixture of the ketone 15 and further rearranged product 19. Ozonolysis followed by intramolecular aldol condensation and hydrogenation transformed the enones 15a,b into the key intermediate keto ketals 13a and 13b. Methoxymethylene Wittig reaction followed by bromoacetalisation
Regioselective synthesis of bicyclo[4.2.1]nonane-2,8-diones via BF3.Et2O mediated intramolecular diazo ketone insertion reaction
作者:A Srikrishna、D.B Ramachary
DOI:10.1016/s0040-4039(98)02656-2
日期:1999.2
Treatment of the diazo diones 11a-d with boron trifluoride diethyl etherate furnished the bicyclo[4.2.1]nonane-2,8-diones 15a-d in a highly regioselective manner.