@article { ISI:000287163000011,
	title = {Construction of the 5,10b-phenanthridine skeleton using [3+2]-cycloaddition of a non-stabilized azomethine ylide: total synthesis of (+/-)-maritidine and (+/-)-crinine alkaloids},
	journal = {European Journal of Organic Chemistry},
	number = {4},
	year = {2011},
	month = {FEB},
	pages = {740-750},
	publisher = {WILEY-V C H VERLAG GMBH},
	address = {PO BOX 10 11 61, D-69451 WEINHEIM, GERMANY},
	abstract = {<p>Vicinal quaternary and tertiary stereocenters of the 5,10b-phenanthridine skeleton 1 are constructed simultaneously in one step by the [3+2]-cycloaddition of non-stabilized azomethine ylide 9, generated by sequential double desilylation of 10 utilizing silver(I) fluoride as a one-electron oxidant. The regioas well as stereochemical origin of this cycloaddition reaction is explained through a favorable transition state 9{\textquoteright}{\textquoteright}. The strategy is successfully applied for the total synthesis of the biologically active alkaloids (+/-)-maritidine (1a), (+/-)-crinine (1b), and their analogues (1d, 1e, and 1f).</p>},
	keywords = {alkaloids, Azomethine ylides, Cycloaddition, Natural products, Ylides},
	issn = {1434-193X},
	doi = {10.1002/ejoc.201001263},
	author = {Pandey, Ganesh and Gupta, Nishant R. and Gadre, Smita R.}
}
@article {45609,
	title = {C-F bond activation by saturated NHC: mesoionic compound formation and its unprecedented adduct with B(C6F5)3},
	journal = {Angewandte Chemie - International Edition},
	volume = {58},
	year = {2019},
	month = {FEB},
	pages = {2804-2808},
	type = {Article},
	abstract = {<p>The reaction of SIPr, [1,3-bis(2,6-diisopropylphenyl)-imidazolin-2-ylidene] (1), with C6F6 led to the formation of an unprecedented mesoionic compound (2). The formation of 2 is made accessible by deprotonation of the SIPr backbone with simultaneous elimination of HF. The C-F bond para to the imidazolium ring in 2 is only of 1.258(4) {\r A}, which is the one of the shortest structurally authenticated C-F bonds known to date. The liberation of HF during the reaction is unequivocally proved by the addition of one more equivalent of SIPr, which leads to the imidazolium salt with the HF2- anion. To functionalize 2, the latter reacted with B(C6F5)3 to give an unusual donor{\textendash}acceptor compound, where the fluoride atom from the C6F5 moiety coordinates to B(C6F5)3 and the carbanion moiety remains unaffected. Such coordination susceptibility of the fluoride atom of a nonmetallic system to a main-group Lewis acid (Fnon-metal{\textrightarrow}BR3) is quite unprecedented.</p>
},
	keywords = {C-F activation, carbanions, N-heterocyclic carbenes, structure elucidation, Ylides},
	issn = {1433-7851},
	doi = {10.1002/anie.201814616},
	author = {Pait, M. and Kundu, G. and Tothadi, S. and Karak, S. and Jain, S. and Vanka, K. and Sen, S. S.}
}
