S. S. C. Chu

Synthesis and reactivity of sulfur and silyl substituted α-alkylidene-β-lactams

Abstract Synthetically valuable α-alkylidene-β-lactams are produced from the addition of chlorosulfonyl isocyanate to allenyl sulfides.

Structure of 2-chloro-10-phenylphenothiazine

ClsH12C1NS, M r= 309.82, monoclinic, P2Jc, a = 19.689 (4), b = 7.240 (1), c = 23.582 (4) A, f l = 1 1 6 . 9 0 ( 1 ) °, V = 2997.8 (9),~, s, Z = 8 , D x = 1.373, D_ = 1.37 g cm -3 (by flotation), 2(Mo Kct) = 0 . 7 1 0 7 , ~ , p = 3.78 cm -~, F ( 0 0 0 ) = 1280, T = 295 K. Final R = 0.036 for 2929 observed reflections. The central ring of the phenothiazine ring system is in a boat conformation. The folding angle between the least-squares planes of the benzo and the chlorobenzo rings is 153.0 (1) and 153.3 (1) ° for the two crystallographically independent molecules in the unit cell. The 10-phenyl substituent is in an equatorial position with respect to the central ring of the phenothiazine ring