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A facile stereoselective synthesis of trisubstituted (Z)/(E)‐alkenes containing a functionalized thioether unit has been accomplished by using a new three‐component tetramolecular reaction (ABCB′‐type) following a Morita–Baylis–Hillman (MBH) route. Syntheses beginning with preformed MBH adducts yield similar results (ABC‐type reaction) and broaden the scope of application. Suitably substituted aromatic aldehydes result in the formation of 3‐substituted‐2H‐thiochromenes in high yield.

A Multi-Component Synthesis of Functionalized O,S-Dialkyldithiocarbonates. -Employing DABCO as catalyst, primary, secondary, and non-allylic alcohols are effectively utilized in the synthesis of the title dithiocarbonates under mild reaction conditions. Morita-Baylis-Hillman adducts behave differently leading to trisubstituted alkenes with thioether moiety (not shown). -(PATRA, G. C.; PAL, S.; BHUNIA, S. C.; HAZRA, N. K.; PAL*, S. C.; Indian J. Chem., Sect. B: Org. Chem. Incl. Med. Chem. 55 (2016) 4, 471-477 ; Dep. Chem., Midnapore Coll., Midnapore 721 101, India; Eng.) -C. Cyrus 40-060

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