Abstract
Chiral amphiphilic conjugate catalysts were designed and synthesized by covalently connecting l-proline with an inexpensive natural product, isosteviol. These catalysts demonstrated remarkable efficiency in the asymmetric α-aminoxylation of aldehydes and ketones using nitrosobenzene in phosphate buffer solution, resulting in good to high yields and excellent enantioselectivities without using any additives. At pH 9.1, the amphiphilic catalysts showed a pH responsive ability in phosphate buffer solution, which facilitated the excellent O-selectivity reactions, illustrating a viable approach for the development of asymmetric supra-molecular catalysts.
Graphical Abstract
References
Davis FA, Chen BC (1995) Methods of organic chemistry. Houben–Weyl Thieme, Stuttgart
Enders D, Reinhold U (1994) Synlett 10:792
Cho BT, Chun YS (1998) J Org Chem 63:5280
Cho BT, Chun YS (1999) Tetrahedron Asymmetr 10:1843
Davis FA, Chen BC (1992) Chem Rev 92:919
Momiyama N, Yamamoto H (2003) J Am Chem Soc 125:6038
Zhong G (2003) Angew Chem Int Ed 42:4247
Brown SP, Brochu MP, Sinz CJ, MacMillan DWC (2003) J Am Chem Soc 125:10808
Hayashi Y, Yamaguchi J, Hibino K, Shoji M (2003) Tetrahedron Lett 44:8293
Hayashi Y, Yamaguchi J, Sumiya T, Shoji M (2004) Angew Chem Int Ed 43:1112
Bøgevig A, Sundén H, Córdova A (2004) Angew Chem Int Ed 43:1109
Córdova A, Sunden H, Bogevig A, Johansson M, Himo F (2004) Chem Eur J 10:3673
Hayashi Y, Yamaguchi J, Hibino K, Sumiya T, Urushima T, Shoji M, Hashizume D, Koshino K (2004) Adv Synth Catal 346:1435
Font D, Bastero A, Sayalero S, Jimeno C, Pericàs MA (2007) Org Lett 9:1943
Mielgo A, Velilla I, Gómez-Bengoa E, Palomo C (2010) Eur J Org Chem 16:496
Wang W, Wang J, Lia H, Liao LX (2004) Tetrahedron Lett 45:7235
Wang W, Wang J, Li H (2004) Tetrahedron Lett 45:7243
Sundén H, Dahlin N, Ibrahem I, Adolfsson H, Córdova A (2005) Tetrahedron Lett 46:3385
Jiao P, Kawasaki M, Yamamoto H (2009) Angew Chem Int Ed 48:3333
Gruttadauria M, Salvo AMP, Giacalone F, Agrigento P, Noto R (2009) Eur J Org Chem 31:5437
Alza E, Cambeiro XC, Jimeno C, Pericas MA (2007) Org Lett 9:3717
Liu YX, Sun YN, Tan HH, Tao JC (2008) Catal Lett 120:281
Liu YX, Sun YN, Tan HH, Liu W, Tao JC (2007) Tetrahedron Asymmetr 18:264
Gao JS, Liu J, Tang JY, Jiang DM, Li B, Yang QH (2010) Chem Eur J 16:7852
Chua PJ, Tan B, Zhong GF (2009) Green Chem 11:543
Yang L, Liu RH, Wang B, Weng LL, Zheng H (2009) Tetrahedron Lett 50:2628
Font D, Jimeno C, Pericàs MA (2006) Org Lett 8:4653
Font D, Sayalero S, Bastero A, Jimeno C, Pericàs MA (2008) Org Lett 10:337
Dickerson TJ, Janda KD (2002) J Am Chem Soc 124:3220
Córdova A, Notz W, Barbas CF III (2002) Chem Commun, p 3024
Hu SS, Li JY, Xiang JF, Pan J, Luo SZ, Cheng JP (2010) J Am Chem Soc 132:7216
Lin Y, Han X, Huang J, Fu H, Yu CJ (2009) Colloid Interface Sci 330:449
Wu Y, Yang JH, Dai GF, Li CJ, Tian GQ, Ma WY, Tao JC (2009) Bioorgan Med Chem 17:1464
Wu Y, Dai GF, Yang JH, Zhang YX, Zhu Y, Tao JC (2009) Bioorg Med Chem Lett 19:1818
An YJ, Zhang YX, Wu Y, Liu ZM, Pi C, Tao JC (2010) Tetrahedron Asymmetr 21:688
Hayashi Y, Aratake S, Okano T, Takahashi J, Sumiya T, Shoji M (2006) Angew Chem Int Ed 45:5527
Fu YQ, An YJ, Liu WM, Li ZC, Zhang G, Tao JC (2008) Catal Lett 124:397
Verma G, Aswal VK, Hassan P (2009) Soft Matter 5:2919
Acknowledgment
The authors are thankful to the financial support of the Natural Science Foundation of China (NSFC 20772113).
Author information
Authors and Affiliations
Corresponding author
Electronic supplementary material
Below is the link to the electronic supplementary material.
Rights and permissions
About this article
Cite this article
An, YJ., Wang, CC., Xu, YZ. et al. Highly Enantioselective α-aminoxylation Reactions Catalyzed by Isosteviol-proline Conjugates in Buffered Aqueous Media. Catal Lett 141, 1123–1129 (2011). https://doi.org/10.1007/s10562-011-0574-6
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10562-011-0574-6