Table 2. Scope of the Reaction.

				(% Yield)a,b
Sl. no	starting materials (1:1:1)			4	5
1	1a	2a	3a	4a (87)	5a (6)
2	1a	2b	3a	4b (85)	5b (7)
3	1b	2a	3a	4c (82)	5c (7)
4	1a	2a	3b	4d (83)	5a (6)
5	1a	2a	3c	4e (82)	5a (8)
6	1a	2b	3b	4f (64)	5b (31)
7	1a	2b	3b	4g (73)	5b (21)
8	1b	2b	3c	4h (6)	5d (81)
9	1a	2c	3a	4i (88)	5e (3)
10	1a	2c	3b	4j (81)	5e (8)
11	1a	2c	3c	4k (79)	5e (10)
12	1b	2c	3a	4l (82)	5f (7)
13	1b	2c	3b	4m (81)	5f (10)
14	1b	2a	3b	4n (86)	5c (5)
15	1b	2a	3c	4o (19)	5c (64)
16	1c	2c	3c		5g (66)

^aOptimized condition.

^bIsolated yield.