Tetrahedron Letters

A facile and unexpected synthesis of two novel condensed heterocycles: 1, 1, 4, 4-tetramethyl-1H, 4H-thieno [3, 4-c] thiophene and 1, 1, 4, 4-tetramethyl-1H, 4H- …

S Braverman, M Freund, I Goldberg

Index: Braverman, Samuel; Freund, Meir; Goldberg, Israel Tetrahedron Letters, 1980 , vol. 21, # 37 p. 3617 - 3620

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Citation Number: 13

Abstract

C10B14S2: C, 60.60; H, 7.07; S, 32.32. Found: C, 60.96; li, 7, QP; S. 32.45 (yield 70%). lhtequivocal structure prod oP 2 vats also abtaf. nad by X-ray c~ t~ lagraph~~ snslysis< Fig. l), in order to exclude the cyclobutauo-1, 2-dithiia l2, which is mechanistically a conceivable product The synthesis of cdqoundzg ie analogous to that of 5, except for the use of~, yd~~ thy~~ al~ yl selenocyanste (6Jg, as starting m&srial. Both compounds 5 and, 7_ are ...