@article { ISI:000327410300055,
	title = {Enhancement of chemical stability and crystallinity in porphyrin-containing covalent organic frameworks by intramolecular hydrogen bonds},
	journal = {Angewandte Chemie-International Edition},
	volume = {52},
	number = {49},
	year = {2013},
	month = {DEC},
	pages = {13052-13056},
	publisher = {WILEY-V C H VERLAG GMBH},
	address = {BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY},
	keywords = {covalent organic frameworks, hydrogen bonds, mesoporous materials, porphyrinoids, tautomerism},
	issn = {1433-7851},
	doi = {10.1002/anie.201306775},
	author = {Kandambeth, Sharath and Shinde, Digambar Balaji and Panda, Manas K. and Lukose, Binit and Heine, Thomas and Banerjee, Rahul}
}
@article {46328,
	title = {Hemiketal-keto tautomerism in 2-deoxy-delta-lactones mediated by 2-lithiothiazole in solution state: a formal synthesis of DAH, Kamusol and their C-5 Epimers},
	journal = {Asian Journal of Organic Chemistry},
	year = {2019},
	month = {OCT},
	type = {Article; Early Access},
	abstract = {<p>The reactions of 2-lithiothiazole on 3,4,6-tri-O-benzyl-2-deoxyglyconolactones have been studied, which resulted in the formation of two products, major (3,4,6-tri-O-benzyl-2-deoxy-1-(2-thiazolyl) glycal) and minor products 3,4,6-tri-O-benzyl-2-deoxy-1-(2-thiazolyl) glycal hemiketal. The hemiketal-keto tautomerism in solution was observed in the minor product. The tautomerism has been studied in various organic solvents and their ratios have been determined by H-1 NMR spectroscopy. The major product from the reaction of 2-lithiothiazole with 2-deoxygluconolactone was utilized for the synthesis of 3-deoxy-D-arabino-2-heptulosonic acid DAH 4 a and 3-deoxy-D-arabino-2-heptulopyranose commonly known natural product kamusol 6 a via acid catalyzed hydration followed by stereoselective methyl glycoside bond formation. Similarly, major product from 2-deoxygalactonolactone furnished 5-epi-DAH 4 b (C-5 epimer of 4 a) and 5-epi-kamusol 6 b (C-5 epimer of 6 a). The minor product has also been utilized for the synthesis of DAH 4 a, 5-epi-DAH 4 b, kamusol 6 a and 5-epi-kamusol 6 b through a common intermediate, alpha-methyl glycosylated product.</p>
},
	keywords = {hemiketals, Ketones, tautomerism, thiazoles, umpolung},
	issn = {2193-5807},
	doi = {10.1002/ajoc.201900407},
	author = {Chand, Hemender R. and Bhattacharya, Asish K.}
}
