20 m 2h 13 c nmr 125 mhz cdcl 3 u03b4 158 0 138 77 138 76 135 7 133 9 132 4 129 63 129 45 128 4 128 0 127 84 127 78 127 53 127 49 119 0 114 0 82 7 76 3 70 6 70 3 55 4 33 4 hrms fab calculated for c 28 h 31 o 3 m h 415 2273 found 415 2287 separation conditions for z e product mixture ad h 10 ipa 2 5 ml min z 93 ee e 79 ee signal 1 dad1 a sig 210 8 ref 360 100 peak rettime width area height area min type min mau s mau 1 9 466 vb 0 2176 4234 35059 305 74072 44 0459 2 10 421 bv 0 2378 4251 52734 279 00278 44 2245 3 10 869 vv 0 2464 545 18933 34 12083 5 6711 4 12 217 vv 0 2952 582 43701 31 58193 6 0585 totals 9613 50427 650 44626 signal 1 dad1 a sig 210 8 ref 360 100 characterization data for arocm ketone 15j 65 isolated yield 90 z z 15j u03b1 d 25 7 98 u00b0 c 1 35 chcl 3 1 h nmr 500 mhz cdcl 3 u03b4 7 39.