Synthesis and reactivity patterns of new proazaphosphatranes and quasi-azaphosphatranes ZP(MeNCH2CH2)3N

O=P(i-PrNCH2CH2)3NCH3+: Novel effect of quaternization on the structural metrics of the bicyclic cage

“…Compounds 1a and 2a were reported earlier by us to form as a mixture with their regioisomers 1b and 2b, respectively, when the corresponding alkyl iodide was added to the parent proazaphosphatrane wherein Z ‫ס‬ S [21]. The upfield 31 P chemical shifts of 1b and 2b suggested that transannulation is present in these compounds.…”

Proazaphosphatrane P(RNCH2CH2)3N (R=Me, i‐Pr)‐Catalyzed Isomerization of Allylaromatics, Allyl Phenyl Sulfide, Allyl Phenyl Sulfone, and bis‐Allylmethylene Double Bond‐Containing Compounds

“…(1) (Scheme 2) has been established in CH 3 CN. [35,38] Using the superbase catalysts 1b or 1c allylaromatics 3a -7a (Scheme 2) were exclusively conjugated to vinylaromatics with the corresponding trans-isomers as the major products (Table 1), while cis-isomers are predominantly formed from isomerization of the same substrates by means of transition metal complexes or ionic bases. Substituent(s) on the phenyl group lessened the reaction rate.…”

Transesterification/Acylation Reactions Catalyzed by Molecular Catalysts

“…For these reasons, Verkade et al turned their attention to less basic derivatives such as iminophosphoranes 7 and 8. 38 Indeed, with catalyst 8 both primary and secondary alcohols show high activities in the transesterification of primary alcohols with enol esters (Table 8) and high selectivity with respect to primary alcohols when both primary and secondary alcohols are used. 39 Various functional groups (e.g.…”