Abstract
AbstractUsing a proazaphosphatrane catalyst, P(RNCH2CH2)3N (R=Me, i‐Pr), allylaromatics and allyl phenyl sulfide were selectively isomerized to the corresponding vinyl isomers in yields up to >99% in CH3CN at 40 °C. Efficient transformation of allyl phenyl sulfone at ambient temperature afforded an isomerization/dimerization product in >95% yield. Conjugation of bis‐allylmethylene double bond‐containing compounds gave the corresponding conjugated isomers for cis,cis‐9,12‐octadecadienol and its methyl ether in yields up to 97%, and desilylation/conjugation products were obtained from the catalytic reaction of the trimethylsilyl ether of cis,cis‐9,12‐octadecadienol. The reaction mechanism is discussed based upon the 1H and 31P NMR‐monitored reactions in CD3CN or CH3CN under the reaction conditions.
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