A mild and general route for preparing 2-pyrones from CO2 and diynes is described. Under
only 1 atm of CO2, excellent yields of pyrone are obtained using catalytic amounts of Ni …

Et; Id, Z= CH2CH2, R= Me; le, Z= CH2CH2, R= n-Bu; If, Z= CH2CH2, R= sec-Bu; lg, Z= O, R=
Et; lh, Z= Nn-Pr, R= Et) to afford 3, 6-dialkyl-4, 5-cycIoalkano-a-pyrones (2) in one step …

The regioselectivity of Ni (0)-catalyzed cycloadditions of CO2 (1atm) with various
asymmetrical diynes to afford pyrones was explored. The use of 1, 3-bis-(2, 6 …

A convenient method for preparing pyridines from air-stable, commercially available catalyst
precursors is described. The addition of n-BuLi to Ni (acac) 2 and an NHC salt (such as IPr⊙ …

A mild and general route for preparing pyrans and dienones from carbonyls and diynes is
described. Ni imidazolylidene complexes were used to mediate cyclizations between diynes …

Conspectus Transition-metal catalysis has revolutionized the field of organic synthesis by
facilitating the construction of complex organic molecules in a highly efficient manner …

1 silyl-substituted bicyclic-pyrones by the Ni (0)-tri-alkylphosphine complex-catalyzed
cycloaddition of ter-minally silyl-substituted diynes with C02 (eqs 1-3). The reaction is also …

The nickel-catalyzed cycloaddition of unsaturated hydrocarbons and carbonyls is reported.
Diynes and enynes were used as coupling partners. Carbonyl substrates include both …

A mild and general route for preparing 2-pyridones from isocyanates and diynes is
described. Ni imidazolyidene complexes were used to mediate cyclizations between both …

Abstract Xanted Nickel!—The catalytic combination of Ni (COD) 2 and Xantphos was used to
access pyridines. The reaction proceeds under ambient conditions to provide excellent …