1, 7-Dithia and 1-oxa-7-thiaspiro [5.5] undecanes. Excellent systems for the study of stereoelectronic effects (anomeric and exo-anomeric effects) in the monothio and …
P Deslongchamps, DD Rowan…
文献索引：Deslongchamps, Pierre; Rowan, Daryl D.; Pothier, Normand; Saunders, John K. Canadian Journal of Chemistry, 1981 , vol. 59, p. 1122 - 1131
1, 7-Dithiaspiro [5.5] undecane (2), 1-oxa-7-thiaspiro [5.5] undecane (4), and the tricyclic systems 3, 5, and 6 have been prepared by the acid cyclization of the appropriate ketone dithiol or hydroxy ketone thiol precursors. The configuration and the conformation of the products obtained was determined by 13C nmr analysis and equilibration studies. The experimental results can be rationalized by taking into account the anomeric and the exo- ...
