Table 1.

Electronic circular dichroism (ECD) (Δε) and UV (ε) data for derivatives 1, 3–11 measured in cyclohexane solution.

Compd.	ECD [Δε (nm)]	UV [ε (nm)]
1a	−9.0 (228); 2.9 (215); −0.1 (208); 47.0 (197); −41.8 (185)	70,500 (194)
1b	−8.0 (229); 1.9 (214); 50.4 (197); −41.8 (186)	67,500 (194)
1c	−6.3 (232); 45.6 (200); −52.8 (185)a	67,800 (194)
1d	−5.0 (229); 2.6 (217); −9.1 (207); 43.4 (196); −31.1 (186)	69,700 (194)
1e	−6.2 (233); 52.5 (201); −62.3 (186)	67,400 (194)
3	2.4 (241); −20.2 (207); 14.0 (185)a	8,000 (236); 73,300 (193)
4	1.4 (296); −0.8 (265); 6.0 (235); −25.7 (205); 47.5 (185)a	1,200 (265); 74,500 (190)
5	−5.9 (235); 41.4 (205); −28.0 (185)a	70,600 (194)
6	1.0 (240); −8.5 (222); −14.7 (204); 20.9 (185)a	8,400 (236); 76,100 (193)
7 b	−2.9 (238); −3.7 (220); 4.3 (207); −2.9 (197); 8.5 (185)a	59,700 (193)
8	−2.5 (238); 3.2 (220); 11.4 (207); −6.5 (191)	5,500 (248); 83,600 (193)
9	−14.6 (235); 83.3 (207); −92.4 (192)	147,000 (192)
10	+5.0 (238); −24.0 (204); 45.0 (185)a	20,000 (238); 135,000 (193)
11	−7.0 (226); 32.3 (200); −24.0 (185)a	77,900 (197)

[a] end of measuring range; [b] partially insoluble in cyclohexane.