参考文献:[1] Patent: US2018/155368, 2018, A1. Location in patent: Paragraph 0090-0096;[2] Journal of the American Chemical Society, 2012, vol. 134, # 2, p. 800 - 803;[3] Chemistry - A European Journal, 2013, vol. 19, # 22, p. 7020 - 7041;[4] Journal of Organic Chemistry, 2018, vol. 83, # 8, p. 4525 - 4536;[5] Journal of Organic Chemistry, 1998, vol. 63, # 22, p. 8019 - 8020