@article {45733,
	title = {Unified approach to fused and spirocyclic oxindoles through lewis-acid-promoted opening of spiroepoxyoxindoles with allylsilanes: application to the formal synthesis of (+/-)-physovenine},
	journal = {European Journal of Organic Chemistry},
	year = {2017},
	month = {MAY },
	pages = {2603-2609},
	type = {Article},
	abstract = {<p>A protocol for the construction of oxindoles containing all-carbon quaternary centres in a highly regioselective manner has been developed. The reaction involves opening of spiroepoxyoxindoles with allylsilanes to give Hosomi-Sakurai-type products as well as new silicon-containing spirocyclic oxindoles. A formal synthesis of (+/-)-physovenine was accomplished in five steps using this protocol.</p>},
	keywords = {alkaloids, Allylation, annulation, Lewis acids, spiro compounds},
	issn = {1434-193X},
	doi = {10.1002/ejoc.201700259},
	author = {Sharma, Brijesh M. and Yadav, Mahesh and Gonnade, Rajesh G. and Kumar, Pradeep}
}
@article {48718,
	title = {Rapid bioinspired N-acyliminium ion strategy for the ABC core of the stemona alkaloids},
	journal = {Asian Journal of Organic Chemistry},
	volume = {12},
	year = {2023},
	month = {SEP},
	type = {Article},
	abstract = {<p>
	A concise and highly diastereoselective bioinspired key cationic cyclization strategy for the asymmetric synthesis of the tricyclic core of the (-)-stemoamide, together with 8,9-bis-epi-stemoamide has been described. The key N-acyliminium ion precursors were accessed from L-tartaric acid and L-malic acid respectively. The use of ethyl acetoacetate derived bifunctional allylidenetriphenylphosphorane reagent in the early stage of the synthetic strategy is advantageous for the rapid construction of highly functionalized key pyrrolo[1,2-\&amp; alpha;]azepine frameworks.</p>
},
	keywords = {alkaloids, Biomimetic synthesis, Claisen rearrangement, cyclization, Regioselectivity},
	issn = {2193-5807},
	doi = {10.1002/ajoc.202300331},
	author = {Chavan, Subhash P. and Kalbhor, Dinesh B. and Gonnade, Rajesh G.}
}
