Table 1.

N -Formylations of primary and secondary amines.¹¹

entry	starting material	product	condition	yield (%)
1			Ba	quant.
2			Ba	quant.
3			Ba	quant.
4			Ba	quant.
5			Ba	quant.
6			Ba	30
7			Ba	25
8			A or B	95
9			A or B	95
10			A or B	95
11			A or B	quant.
12			A or B	quant.
13			A or B	95
14			A or B	95
15			Ab	90
16			Ab	85
17			Ab	95
18			Ab	90
19			A	90
20			A	30
21			A	50

^aThe condition A was also effective.

^bThe same reaction under the condition B yielded the product in 30–60% yield.