Back Cover: From Palladium to Brønsted Acid Catalysis: Highly Enantioselective Regiodivergent Addition of Alkoxyallenes to Pyrazolones (Angew. Chem. Int. Ed. 4/2017)
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- 作者：Hui Zhou ; Zhao Wei ; Dr. Jinlong Zhang ; Huameng Yang ; Prof. Dr. Chungu Xia and Prof. Dr. Gaoxi Jiang
- 刊名：Angewandte Chemie International Edition
- 出版年：2017
- 出版时间：January 19, 2017
- 年：2017
- 卷：56
- 期：4
- 页码：1160
- 全文大小：2505K
- ISSN：1521-3773
文摘
Two catalytic processes namely, palladium catalysis and Brønsted acid catalysis, lead to different alkylation products in the addition of alkoxyallenes to pyrazolones. In their Communication on page 1077, G. Jiang et al. demonstrate how Pd catalysis provides branched allylic pyrazol-5-ones under mild conditions, whereas a chiral Brønsted acid catalyst gives the linear addition products.