Table 3.

Cyclopropanation by 5 a–e from 1 a–e (left) or through decarbenation of 4 a (right).^[a]

Entry	Precursor	Yield [%][b]
		3 c	3 d	3 e
1	1 a	99	80	99 (2.3:1)
2	1 b	87	90	99 (3:1)
3	1 c	99	99	99 (1:1.2)
4	1 d	99 (1:1.5)31	99	72 (1:2.1)
5	1 e	99	90	99 (3.5:1)
6	4 a	32	38	17 (1:7.5)

[a] Yields determined by ¹H NMR spectroscopy using Ph₂CH₂ as the internal standard. [b] Diastereomeric ratio given within parenthesis. DCE=1,2‐dichloroethane.