The insertion and extrusion of heterosulfur bridges. VI. Comparative desulfurizations of dibenzothiophene and biphenylthiols | Zendy

Klemm L. H. | Zendy; Karchesy Joseph J. | Zendy

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The insertion and extrusion of heterosulfur bridges. VI. Comparative desulfurizations of dibenzothiophene and biphenylthiols

Author(s) -

Klemm L. H.,

Karchesy Joseph J.

Publication year - 1978

Publication title -

journal of heterocyclic chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.321

H-Index - 59

eISSN - 1943-5193

pISSN - 0022-152X

DOI - 10.1002/jhet.5570150219

Subject(s) - chemistry , dibenzothiophene , biphenyl , flue gas desulfurization , thermal decomposition , methanol , extrusion , fluorene , oxide , atmospheric pressure , organic chemistry , metallurgy , polymer , materials science , oceanography , geology

Products were determined from reaction of biphenyl‐2‐thiol ( 5 ) with methanol in a packed flow reactor at elevated temperatures and ca . atmospheric pressure. At 450–550° thermolysis of 5 gives small yields of dibenzothiophene ( 1 ) and biphenyl ( 2 ). With sulfided alumina, products vary with reaction temperature from 82% S‐methyl‐ 5 at 250° to only 1 plus 2 at 550°. At 450° with sulfided cobaltous oxide‐molybdic oxide‐aluminum oxide (CMA‐1), 5 and its isomers give mainly desulfurization to 2 (81%), plus C ‐melhylalion to melhylbiphenyls and fluorene. With CMA‐1 at 450° the arrays of products from 1 and 5 are closely similar.

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