Login In
Citation:
Bing YANG, Jun YANG, Ling Ling WENG, Hu ZHENG. Regioselective Decomposition of 11-Substituted-16α, 17α-methyleneazopregna-1, 4-dien-3, 20-dione[J]. Chinese Chemical Letters,
;2006, 17(1): 12-14.
-
Regioselective decomposition of 11-substituted-16α, 17α-methyleneazopregna-1, 4-dien-3, 20-dione I proceeded smoothly through thermal decomposition in the presence of BF3·Et2O or HC1O4with high yields. I was converted to 11-substituted-16-methylpregna-1, 4, 16(17)-trien-3, 20-dione Ⅱ by the thermal decomposition, while with HClO4 as a catalyst, 11-substituted-16α, 17α-methylenepregna-1, 4-dien-3, 20-dione Ⅲ was the main product.However, when BF3·Et20 was used as catalyst, a mixture of Ⅱ and Ⅲ (1:3) was obtained.
-
Keywords:
- Methyleneazopregnanes,
- methylenepregnanes,
- regioselective,
- decom,
- position
-
-
-
-
[1]
Wujun Jian , Mong-Feng Chiou , Yajun Li , Hongli Bao , Song Yang . Cu-catalyzed regioselective diborylation of 1,3-enynes for the efficient synthesis of 1,4-diborylated allenes. Chinese Chemical Letters, 2024, 35(5): 108980-. doi: 10.1016/j.cclet.2023.108980
-
[2]
Qiongqiong Wan , Yanan Xiao , Guifang Feng , Xin Dong , Wenjing Nie , Ming Gao , Qingtao Meng , Suming Chen . Visible-light-activated aziridination reaction enables simultaneous resolving of C=C bond location and the sn-position isomers in lipids. Chinese Chemical Letters, 2024, 35(4): 108775-. doi: 10.1016/j.cclet.2023.108775
-
[1]
Metrics
- PDF Downloads(0)
- Abstract views(1047)
- HTML views(5)
DownLoad: