@article { ISI:000231294400029,
	title = {Stereospecific route to 5,11-methanomorphanthridine alkaloids via intramolecular 1,3-dipolar cycloaddition of nonstabilized azomethine ylide: Formal total synthesis of (+/-)-pancracine},
	journal = {Organic Letters},
	volume = {7},
	number = {17},
	year = {2005},
	month = {AUG},
	pages = {3713-3716},
	publisher = {AMER CHEMICAL SOC},
	type = {Article},
	address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA},
	abstract = {<p>[GRAPHICS] The core structure of the complex pentacyclic 5,11-methanomorphanthridine alkaloids is constructed stereospecifically in one step employing an intramolecular [3 + 2]-cycloaddition of nonstabilized azomethine ylide as the key step. The strategy is demonstrated by accomplishing the formal total synthesis of (+/-)-pancracine.</p>},
	issn = {1523-7060},
	doi = {10.1021/ol051321o},
	author = {Pandey, Ganesh and Banerjee, Prabal and Kumar, Ravindra and Puranik, Vedavati G.}
}
@article { ISI:000241906100003,
	title = {Construction of enantiopure pyrrolidine ring system via asymmetric [3+2]-cycloaddition of azomethine ylides},
	journal = {Chemical Reviews},
	volume = {106},
	number = {11},
	year = {2006},
	month = {NOV},
	pages = {4484-4517},
	publisher = {AMER CHEMICAL SOC},
	type = {Article},
	address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA},
	issn = {0009-2665},
	doi = {10.1021/cr050011g},
	author = {Pandey, Ganesh and Banerjee, Prabal and Gadre, Smita R.}
}
@article { ISI:000294656400011,
	title = {One-step stereospecific strategy for the construction of the core structure of the 5,11-methanomorphanthridine alkaloids in racemic as well as in optically pure form: synthesis of (+/-)-pancracine and (+/-)-brunsvigine},
	journal = {European Journal of Organic Chemistry},
	number = {24},
	year = {2011},
	month = {AUG},
	pages = {4571-4587},
	publisher = {WILEY-V C H VERLAG GMBH},
	address = {PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY},
	abstract = {<p>The unique core structure of the complex pentacyclic 5,11-methanomorphanthridine has been constructed stereospecifically in one step by an intramolecular [3+2] cycloaddition of a non-stabilized azomethine ylide (AMY), generated by the sequential double desilylation of 14 using (AgF)-F-I as a one-electron oxidant. The formation of the single diastereomer in the key step is explained by the preferred transition state produced by endo attack of the AMY on the {\textquoteleft}{\textquoteleft}Re{\textquoteright}{\textquoteright} face of the dipolarophile. An asymmetric version of the cycloaddition using a chiral dipolarophile was applied to construct the core structure 68 with 63 \% ee. This strategy was successfully applied to the formal synthesis of (+/-)-pancracine and the total synthesis of (+/-)-brunsvigine. An unprecedented and interesting skeletal rearrangement product 49 was observed during the attempted assembly of the E ring from 46 through Horner-Wadsworth-Emmons reactions. Mechanisms involving azetidinium salt formation or the Grob-type fragmentation are advanced to explain the observed rearrangement.</p>},
	keywords = {alkaloids, Azomethine ylides, Cycloaddition, Ring-closing metathesis, synthesis design},
	issn = {1434-193X},
	doi = {10.1002/ejoc.201100601},
	author = {Pandey, Ganesh and Kumar, Ravindra and Banerjee, Prabal and Puranik, Vedavati G.}
}
