Electrocyclization of Phosphahexatrienes: An Approach to λ5-Phosphinines
摘要:
We experimentally verified an assumption that the substitution of a carbon atom with a pentavalent phosphorus atom in 1-alkoxy (dialkylamino) hexatrienes will not hamper its ability to electrocyclize. A series of 1-, 3-, and 5-phosphahexatrienes were synthesized. It was shown that parent lambda(5)-phosphinines could be synthesized by electrocyclization of the 3- and 5-phosphahexatrienes. The resultant electrocyclization is a convenient method for the synthesis of parent lambda(5)-phosphinines bearing different substituents on the phosphorus atom.
Versatile Approach to 3-Phosphahexatrienes Bearing Low Coordinated Phosphorus
作者:Anna I. Arkhypchuk、Yurii V. Svyaschenko、Sascha Ott
DOI:10.1080/10426507.2014.983596
日期:2015.6.3
GRAPHICAL ABSTRACT Abstract λ3-phosphahexatrienes were prepared from ethoxyvinyl phosphinophosphonates using the phospha-Wittig–Horner reaction. The title compounds can be easily prepared in three steps starting from dichlorophosphines with good overall yields. Although these were found to be thermally unstable, these can be trapped, for instance, with methanol. The resulting methoxyphosphines are