@article {42714,
	title = {Cyclodiphosph(III)azane chemistry {\textendash} ylides from the reaction of [(RNH)P-N(t-Bu)]2 [R = t-Bu, i-Pr] with dimethyl maleate and chiral ansa-type derivatives from reaction of [ClP-N(t-Bu)]2 with a substituted BINOL},
	journal = {Inorganica Chimica Acta},
	volume = {372},
	year = {2011},
	month = {JUN},
	pages = {374{\textendash}382},
	abstract = {<p>Use of a simple inorganic ring system with the cyclodiphosph(III)azane skeleton [e.g. [(RNH)P-N(t-Bu)]2 [R = t-Bu (7), i-Pr (8)] to probe some of the intermediates proposed in phosphine mediated organic reactions is highlighted. Thus the reaction of 7{\textendash}8 with the allenylphosphine oxide Ph2P(O)C(Ph)double bond; length as m-dashCdouble bond; length as m-dashCH2 (9) affords the phosphinimines [(RNH)P(μ-N-t-Bu)2P(double bond; length as m-dashN-R)-C(double bond; length as m-dashCH2)CH(Ph)-P(O)Ph2] [R = t-Bu (10), i-Pr (11)], while a similar reaction of 7{\textendash}8 with dimethyl maleate (or dimethyl fumarate) affords the ylides [(RNH)P(μ-N-t-Bu)2P(NH-R)double bond; length as m-dashC(CO2Me)-CH2(CO2Me) [R = t-Bu (18), i-Pr (19)]. The implication of such reactions on phosphine mediated organic transformations including Morita{\textendash}Baylis{\textendash}Hillman reaction is mentioned. In a rather rare type of situation, an unusually long phosphoryl (Pdouble bond; length as m-dashO) bond [1.538 (5) {\r A}] as revealed the X-ray structure of {(R)-6,6'-(t-Bu)2-1,1'-(C10H5)2-2,2'-O2-}{P(O)(N-t-Bu)2-P(Se)} (27) is rationalized by means of crystallographic disorder in packing after comparing the data with that in the literature and {1,1'-(C10H6)2-2,2'-O2}{P(Se)(N-t-Bu)2-P(Se)} (29). X-ray structures of the new compounds 10{\textendash}11, 18{\textendash}19, 27 and 29 are discussed. Compound 10 crystallizes in the chiral space group Pca2(1) with (S)-chirality at the carbon center [{\textendash}C(double bond; length as m-dashCH2)CH(Ph)-P] suggesting a case of spontaneous resolution through crystallization.</p>},
	doi = {10.1016/j.ica.2010.12.072},
	author = {Swamy, K.C. Kumara and Gangadhararao, G. and Srinivas, Venu and Kumar, N. N. Bhuvan and Balaraman, Ekambaram and Chakravarty, Manab}
}
@article { ISI:000341023400022,
	title = {Easy access to alpha-aryl substituted gamma-ketophosphonates: lewis acid mediated reactions of 1,3-diketones with alpha-hydroxyphosphonates and tandem regioselective C-C bond cleavage},
	journal = {Organic \& Biomolecular Chemistry},
	volume = {12},
	number = {36},
	year = {2014},
	month = {JUL},
	pages = {7140-7149},
	publisher = {ROYAL SOC CHEMISTRY},
	type = {Article},
	address = {THOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLAND},
	abstract = {<p>A range of alpha-aryl substituted gamma-ketophosphonates is synthesised by Lewis acid mediated reactions of 1,3-diketones and easily accessible, inexpensive benzylic alpha-hydroxyphosphonates in an operationally simple method under solvent-free conditions without exclusion of air/moisture. A regioselective C-C bond cleavage for 1,3-diketones in a tandem fashion has also been demonstrated. Synthesis of a gamma-ketophosphonate with phenol functionality at the a-position (structural analogue of raspberry ketone, a natural product) has also been presented.</p>},
	issn = {1477-0520},
	doi = {10.1039/c4ob01091d},
	author = {Pallikonda, Gangaram and Chakravarty, Manab and Sahoo, Manoj Kumar}
}
