An ultraviolet absorbent represented by the following Formula (1) or (6):
wherein, Het
1
represents a monovalent five- or six-membered aromatic heterocyclic residue; X
a
and X
b
each independently represent a heteroatom; Y
a
to Y
c
each independently represent a heteroatom or a carbon atom; the ring formed from carbon atom, X
a
, X
b
, Y
a
to Y
c
may have a double bond at any position and has at least one fused ring;
wherein, Het
6
represents a monovalent five- or six-membered aromatic heterocyclic residue; X
6a
and X
6b
each independently represent a heteroatom; Y
6a
, Y
6b
and Y
6c
each independently represent a heteroatom or a carbon atom; L
6
represents a bi- to octa-valent connecting group; n is an integer of 2 or more, and m is an integer of 0 or more.
Rhodium(III)-Catalyzed C–H Activation: Annulation of Petrochemical Feedstocks for the Construction of Isoquinolone Scaffolds
作者:Ryan L. Patman、Joyann S. Barber、Dehuan Kong、Wei Li、Indrawan J. McAlpine、Sajiv K. Nair、Sylvie K. Sakata、Nicole Sun
DOI:10.1055/s-0040-1706548
日期:2021.1
feedstock gases enabled through C–H activation. A diverse set of 3,4-dihydroisoquinolones and 3-methylisoquinolones have been prepared in good to excellent yields. The effects of using ethylene and propyne as coupling partners on C–H site selectivity have also been explored with a representative set of substrates and are discussed herein.