[5C+ 1S] annulation: A facile and efficient synthetic route toward functionalized 2, 3-dihydrothiopyran-4-ones

X Bi, D Dong, Y Li, Q Liu, Q Zhang

Index: Lawson, Kevin R.; McDonald, Brian P.; Mills, Owen S.; Steele, Robert W.; Sutherland, James K.; et.al. Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1988 , p. 663 - 674

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Citation Number: 67

Abstract

... 1S] annulation reaction with respect to the α-alkenoyl ketene-(S,S)-acetals 1 with various R 1 , R 2 , and R 3 groups. ... 5-Benzoyl-6-ethylthio-2-(p-tolyl)-2,3-dihydrothiopyran-4-one (2a ... 1 H NMR (500 MHz, CDCl 3 ) δ = 1.26 (t, J = 7.5 Hz, 3H), 2.33 (s, 3H), 2.93−3.05 (m, 3H), 3.27 (dd ...