Optimization of the photocatalytic deoxygenative cyanation with isonitriles^a.

Entry	Solvent	4CzIPN (mol%)	Yield %
1	MTBE : DMA (1 : 1)	1.2	30
2	MTBE	1.2	46
3	Dioxane	1.2	52
4	Dioxane : DMSO (1 : 1)	1.2	75
5b	Dioxane : DMSO (1 : 1)	1.2	60
6c	Dioxane : DMSO (1 : 1)	1.2	0
7d	Dioxane : DMSO (1 : 1)	—	0

^aThe reactions were performed on a 0.10 mmol scale and the yields were determined after isolation by column chromatography purification.

^bThe reaction was performed on a 0.20 mmol scale.

^cThe reaction was performed in the absence of light.

^dThe reaction was performed in the absence of photocatalyst. See ESI for further details.