## Cyclization of alkenol by an electrophilic organoselenium reagent is the important procedure for the synthesis of cyclic ether. 1 However previous reagents for oxyselenation do not always give satisfactory results, e.9. low reactivity, poor selectivity, and addition of the halide ion. Recently
Cyclization of terpene alcohols and related polyenols by benzeneselenenyl triflate
β Scribed by Shizuaki Murata; Toshiyasu Suzuki
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- French
- Weight
- 246 KB
- Volume
- 31
- Category
- Article
- ISSN
- 0040-4039
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π SIMILAR VOLUMES
## Abstract Oxyselenylation of 4βsubstituted 5βhexenβ1βols 1 with benzeneselenenyl trifluoromethanesulfonate proceeds by intramolecular __exo__ cyclization stereoselectively to give 3βsubstituted __trans__β or __cis__β2β(phenylselenenylmethyl)tetrahydropyrans 3. Formation of the __trans__ isomers i
Nero1 is cyclized to terpinyl chloride or bromide in the presence of TiXq-PhNHMe (1:l) complex in dichloromethane at -23 "C, while cyclization of (Z)-allylic alcohols CH2=CR-CH2CH2CMe=CHCH20H (R = H, Me, Cl) produces seven-membered r-7ng products in fair yields.