Facile Synthesis of Onychines

In the graphical abstract, Table [3], and Table [4], the position of the substituent after ring closure is incorrect.

The following schemes are correct:

Toc graphic

Table 3

Table 4

The correct compound names in the experimental section are:

7-Hydroxy-4-methyl-5H-indeno[1,2-b]pyridin-5-one (1Ba)

7-Hydroxy-3,4-dimethyl-5H-indeno[1,2-b]pyridin-5-one (1Bb)

7-Hydroxy-2,3,4-trimethyl-5H-indeno[1,2-b]pyridin-5-one (1Bc)

7-Hydroxy-2-phenyl-4-methyl-5H-indeno[1,2-b]pyridin-5-one (1Bd)

4-Methyl-7-propoxy-5H-indeno[1,2-b]pyridin-5-one (1Be)

7-Benzyloxy-4-methyl-5H-indeno[1,2-b]pyridin-5-one (1Bf)

4-Methyl-7-(3-propenyloxy)-5H-indeno[1,2-b]pyridin-5-one (1Bg)

7-Acetoxy-4-methyl-5H-indeno[1,2-b]pyridin-5-one (1Bh)

4-Methyl-7-(trifluoromethanesulfonyloxy)-5H-indeno[1,2-b]pyridin-5-one (1Bi)

Synthesis 2019, 51, 2007.