New spirans containing a 1,5-benzodithiepine system, derived from methylbenzenes. Conformational transmission
[structure: see text] A synthesis of three new spirans, derived from methylbenzenes, containing the 1,5-benzodithiepine system is reported. X-ray structure proved the identity of model monospiran 9. In the solid and liquid state, the conformation of the seven-membered ring is chair, and the five-membered ring has the envelope conformation. The effect of conformational transmission in spirans 9 and 10 was observed. The synthesis of trispirans from hexamethylbenzene using the proposed scheme is also possible.
Baranska
J
Department of Organic Chemistry, Jagiellonian University, Krakow, Poland.
Grochowski
J
Jamrozik
J
Serda
P