The hallmark of nucleophilic phosphine catalysis is the initial nucleophilic addition of a
phosphine to an electrophilic starting material, producing a reactive zwitterionic …

In the past decade, interest in pyrazole chemistry has significatively increased mainly due to
the discovery of the interesting properties exhibited by a great number of pyrazole …

Nucleophilic phosphine catalysis has proven to be a powerful tool in organic synthesis,
which can provide easy access to cyclic, bicyclic or polycyclic carbocycles and heterocycles …

With the aid of computations and experiments, the detailed mechanism of the phosphine‐
catalyzed [3+ 2] cycloaddition reactions of allenoates and electron‐deficient alkenes has …

Engaging Zwitterions in Carbon−Carbon and Carbon−Nitrogen Bond-Forming Reactions: A
Promising Synthetic Strategy | Accounts of Chemical Research ACS ACS Publications C&EN …

Pyrazole (Figure 1), a five-membered, two-nitrogen-containing heterocycle ring, is widely
found as the core structure in a large variety of compounds that possess important …

The cascade reactions between NH 2-functionalized enaminones and sulfonyl hydrazines
have been developed for the synthesis of fully substituted pyrazoles. By making use of the …

Catalytic addition of chiral phosphine, that is,(R)‐or (S)‐SITCP, to an α‐substituted allene
ester generated a zwitterionic dipole. Under optimized reaction conditions, this dipole could …

Synthesis of tetrasubstituted thiophenes via a [3+2] cascade cyclization reaction of pyridinium
1,4-zwitterionic thiolates and activated allenes - Chemical Communications (RSC Publishing) …

2-Styrenyl allenoates are converted into cyclopentene-fused dihydrocoumarins through
phosphine-catalyzed regio-and diastereoselective [3+ 2] cycloadditions. Remarkably …