参考文献: [1] Patent: EP1621529, 2006, A1. Location in patent: Page/Page column 31 [2] Preparative Biochemistry and Biotechnology, 2013, vol. 43, #2, p. 207-216 [3] European Journal of Medicinal Chemistry, 2018, vol. 156, p. 252-268 [4] Advanced Synthesis and Catalysis, 2017, vol. 359, #9, p. 1570-1576 [5] Heterocycles, 1989, vol. 28, #2, p. 1015-1035 [6] Advanced Synthesis and Catalysis, 2010, vol. 352, #2-3, p. 395-406 [7] Journal of the American Chemical Society, 1946, vol. 68, p. 1137 [8] Arzneimittel-Forschung/Drug Research, 2005, vol. 55, #5, p. 259-264 [9] Angewandte Chemie - International Edition, 2005, vol. 44, #45, p. 7466-7469 [10] Journal of Medicinal Chemistry, 2001, vol. 44, #12, p. 1938-1950 [11] European Journal of Organic Chemistry, 2013, #3, p. 557-565 [12] Bulletin of the Chemical Society of Japan, 2013, vol. 86, #7, p. 870-879 [13] Bioorganic and Medicinal Chemistry, 2015, vol. 23, #6, p. 1356-1365