The cyanidation of aromatic aldehydes with different proportions of water.

Compound	HCOOH/H2O (%)	Time (h)	Yielda (%)
1b	60 : 40	6	56
	50 : 50	12	—
2b	60 : 40	6	78
	50 : 50	12	75
	40 : 60	24	61
	30 : 70	36	52
	20 : 80	48	—
3b	60 : 40	6	78
	50 : 50	12	70
	40 : 60	24	51
	30 : 70	36	—
4b	60 : 40	6	91
	50 : 50	12	67
	40 : 60	24	—
5b	60 : 40	6	77
	50 : 50	12	77
	40 : 60	24	56
	30 : 70	36	50
	20 : 80	48	—
8b	60 : 40	6	86
	50 : 50	12	85
	40 : 60	24	79
	30 : 70	36	52
	20 : 80	48	—
20b	60 : 40	6	70
	50 : 50	12	65
	40 : 60	24	56
	30 : 70	36	—
21b	60 : 40	6	82
	50 : 50	12	80
	40 : 60	24	69
	30 : 70	36	—
25b	60 : 40	6	56
	50 : 50	12	38
	40 : 60	24	—

^aYield of crude products. —: raw material is not well dissolved and the yield is lower than 30%, so it is regarded as no reaction.