Synlett
References
4-Thianone is an excellent surrogate for 3-pentanone, which is unreactive under proline catalysis (see ref.). For an earlier example of the 4-thianone strategy in polypropionate synthesis, see: Woodward RB, Logusch E, Nambiar KP, Sakan K, Ward DE, Au-Yeung B.-W, Balaram P, Browne LJ, Card PJ, Chen CH, Chênevert RB, Fliri A, Frobel K, Gais H.-J, Garrat DG, Hayakawa K, Heggie W, Hesson DP, Hoppe D, Hoppe I, Hyatt JA, Ikeda D, Jacobi PA, Kim KS, Kobuke Y, Kojima K, Krowicki K, Lee VJ, Leutert T, Malchenko S, Martens J, Matthews RS, Ong BS, Press JB, Rajan Babu TV, Rousseau G, Sauter HM, Suzuki M, Tatsuta K, Tolbert LM, Truesdale EA, Uchida I, Ueda Y, Uyehara T, Vasella AT, Vladuchick WC, Wade PA, Williams RM, Wong HN.-C,
J. Am. Chem. Soc.. 1981; 103 3210
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