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. Author manuscript; available in PMC: 2019 Feb 23.
Published in final edited form as: J Nat Prod. 2018 Feb 1;81(2):316–322. doi: 10.1021/acs.jnatprod.7b00745

Scheme 3. Scope of the Sulfa-Michael Addition between PTN (A) or Platensic Acid Ethylester 4 (B) and Thioacid or Thiol Compounds 1a.

Scheme 3.

aOn a 0.1 mmol scale, PTN or 4:1:Cs2CO3 = 1.0:3.0:0.5; products 3 and 5 were obtained as single isomers only.