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. Author manuscript; available in PMC: 2011 May 7.
Published in final edited form as: Org Lett. 2010 May 7;12(9):2120–2122. doi: 10.1021/ol100615j

Table 1.

Reaction Results from Scheme 1.

compound (A,B) R R′ A yield, % B yield, % ee (%)a
5, 12 Bn (1a) OMe (4a) 73 87 95
6, 13 Bn (1a) O(t-Bu) (4b) 73 63 95
7, 14 Bn (1a) OBn (4c) 81 70 95
8, 15 cyclohexyl (1b) OBn (4c) 79 67 95
9, 16 N-Boc-piperidine (1c) OBn (4c) 83 67 94
10, 17 BnO(CH2)4 (1d) OBn (4c) 48 90 97
11, 18b CH3(CH2)13(1e) OBn (4c) 77 83 95
a

ee values determined using chiral HPLC and racemic standards;

b

catalyst (2R)-2 was used.