@article { ISI:000232166800028,
	title = {Diastereoselective and general route to 5-amino-5-deoxysugars: influence of C-3 substitution on the addition of amines to C-5 of vinyl sulfone-modified Hex-5-enofuranosyl carbohydrates},
	journal = {Journal of Organic Chemistry},
	volume = {70},
	number = {20},
	year = {2005},
	month = {SEP},
	pages = {8047-8054},
	publisher = {AMER CHEMICAL SOC},
	type = {Article},
	address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA},
	abstract = {<p>In the synthesis of vinyl sulfone-modified hex-5-enofuranosides, the E/Z ratios of the products are influenced by the stereoelectronic property of a group present at the C-3 position. This observation has been utilized to influence the diastereoselectivity of addition of amines to C-5 of vinyl sulfone-modified hex-5-enofuranosides, which are efficient Michael acceptors. The stereoelectronic effect of OMe attached to the beta-face of C-3 (gluco derivative) is sufficient to impose diastereoselectivity overwhelmingly in favor of L-ido-aminosugars when the Michael acceptor is reacted with both primary and secondary amines. 3-O-Benzylated gluco derivative is also effective in producing L-ido-aminosugars but only in reactions with primary amines. The selectivity is lost when an allo derivative with OBn at the alpha-face of C-3 is used. Selected products were desulfonated to establish this new approach as a general and versatile strategy for accessing 5-amino-5-deoxysugars.</p>},
	issn = {0022-3263},
	doi = {10.1021/jo051143c},
	author = {Das, Indrajit and Pathak, T. and Suresh, C. G.}
}
@article { ISI:000256613900001,
	title = {Unusual addition of amines to C-2 of vinyl sulfone-modified-beta-D-pent-2-enofuranosyl carbohydrates: synthesis of a new class of beta-anomeric 2-amino-2,3-dideoxy-D-threo-pentofuranosides},
	journal = {Carbohydrate Research},
	volume = {343},
	number = {8},
	year = {2008},
	month = {JUN},
	pages = {1287-1296},
	publisher = {ELSEVIER SCI LTD},
	type = {Article},
	address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND},
	abstract = {<p>When 3-C-sulfonyl-pent-2-enofuranosides and 3-C-sulfonyl-hex-2-enofuranosides were reacted with primary and secondary amines, only the beta-anomeric methoxy group of the pent-2-enofuranoside did not cause any hindrance to incoming nitrogen nucleophiles. This resulted in the {\textquoteleft}unusual{\textquoteright} addition of amines, in which the diastereoselectivity of the reaction was overwhelmingly in favor of amino sugars of the D-arabino configuration. Selected products were desulfonylated to obtain a new class of beta-anomeric 2-amino-2,3-dideoxy-D-threo-pentofuranosides. (C) 2008 Elsevier Ltd. All rights reserved.</p>},
	keywords = {amino sugars, deoxyaminosugars, desulfonylation with Mg-MeOH-NiBr(2), diastereoselective Michael addition, vinyl sulfone-modified carbohydrates},
	issn = {0008-6215},
	doi = {10.1016/j.carres.2008.03.022},
	author = {Das, Indrajit and Suresh, Cheravakkattu G. and Decout, Jean-Luc and Pathak, Tanmaya}
}
