Table 4. Cross Metathesis of Amino Acids 3 and 5a.

			yielda (%)		Z selectivityb (%)
entry	equiv of 3	equiv of 5a	1	2	1	2
1	1	1	41	47	90	93
2	1	2	44	48	86	91
3	1	4	48	41	91	90
4	1	6	58	60	88	90
5	2	1	44	58	90	93
6	4	1	52	57	91	91
7	6	1	51	60	87	90

^aIsolated yields.

^bDetermined by ¹H or ¹³C NMR spectroscopy.