论文部分内容阅读
对氯苯甲醛与α－三唑基频哪酮在ＫＦ／Ａｌ２Ｏ３／ＰＥＧ４０００存在下经Ｋｎｏｅｖｅｎａｇｅｌ反应得８５％烯基三唑酮（Ⅱ）（Ｅ／Ｚ＝０．６５），Ⅱ经光异构化得９２％Ｅ－Ⅱ（Ｅ／Ｚ≥９９／１）；Ｅ－Ⅱ在手性相转移催化剂的存在下进行选择性不对称还原得９２％Ｕｎｉｃｏｎａｚｏｌｅ－Ｐ（Ⅰ），ｅｅ＝３０％，Ｅ／Ｚ≥９９／１．Ⅰ是高效的植物生长延缓剂．
The reaction of p-chlorobenzaldehyde with α-triazolyl pinacone gave 85% alkenyltriazolone (Ⅱ) (E / Z = 0.65) via Knoevenagel reaction in the presence of KF / 92% Uniconazole-P (I), ee = 30% was obtained by selective asymmetric reduction of E-II in the presence of a chiral phase transfer catalyst, E / Z≥99 / 1. Ⅰ is a highly effective plant growth retarding agent.