Asymmetric Binary-Acid Catalysis in the Inverse-Electron-Demanding Hetero-Diels-Alder Reaction of 3,4-Dihydro-2 H-Pyran
Lv Jian, Zhong Xingren, Cheng Jin-Pei, Luo Sanzhong
Acta Chimica Sinica . 2012, (14): 1518 -1522 .  DOI: 10.6023/A12060346