Synthesis 2019; 51(08): 1832-1840
DOI: 10.1055/s-0037-1610683
paper
© Georg Thieme Verlag Stuttgart · New York

Regio- and Stereoselective Synthesis of a Novel Family of Unsaturated Compounds with the S–Se Bond and Their Cyclization to 2,3-Dihydro-1,4-thiaselenines

Svetlana V. Amosova*
A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Division of the Russian Academy of Sciences, 1 Favorsky Str., Irkutsk 664033, Russian Federation   Email: amosova@irioch.irk.ru
,
Andrey S. Filippov
,
Vladimir A. Potapov
,
Maxim V. Penzik
,
Nataliya A. Makhaeva
,
Alexander I. Albanov
› Author Affiliations
Further Information

Publication History

Received: 26 September 2018

Accepted after revision: 20 November 2018

Publication Date:
24 January 2019 (online)


Abstract

Regio- and stereoselective ring-opening reaction of 2-bromomethyl-1,3-thiaselenole with thiols proceeded as nucleophilic attack at the selenium atom of seleniranium intermediate affording unsaturated selanyl sulfides, (Z)-CH2=CHSCH=CHSeSR, in up to 93% yield. Dithiols were involved in this reaction giving symmetrical polyunsaturated compounds with two S–Se bonds in 70–75% yields. Efficient synthesis of 2-(organylsulfanyl)-2,3-dihydro-1,4-thiaselenines in 69–96% yields was developed by the acid-catalyzed cyclization of the unsaturated selanyl sulfides. Mild reaction conditions (room temperature) and short reaction times are important features of this methodology.

Supporting Information