Citation:
Guang Disn HAN, Hong Yau WEN. A NEW METHOD FOR THE AROMATIZATION OF 18-METHYL-ESTRA-4(5), 9(10)-DIEN-3,17-DIONE[J]. Chinese Chemical Letters,
;1992, 3(6): 419-420.
-
An aromatization reaction was found when 18--methyl--estra--4(5),9(10)--dien--3, 17--dione(6) was treated with triethyl orthoforrnate in dioxane in thepresence of catalytic amount of p--toluenesulfonic acid (TsOH), and 18--methyl--9(11)--dehydroestrone--3--ethyl ether (8) was obtained in 70% yield.The mechanism wasfound to be a process of etherification--oxidation reaction
-
-
-
-
[1]
Keyang Li , Yanan Wang , Yatao Xu , Guohua Shi , Sixian Wei , Xue Zhang , Baomei Zhang , Qiang Jia , Huanhua Xu , Liangmin Yu , Jun Wu , Zhiyu He . Flash nanocomplexation (FNC): A new microvolume mixing method for nanomedicine formulation. Chinese Chemical Letters, 2024, 35(10): 109511-. doi: 10.1016/j.cclet.2024.109511
-
[2]
Hanqi Zhang , Biao Gao , Yuanyuan Feng , Guijuan Zheng , Zhijun Liu , Lichun Kong , Junjun Liu , Haji Akber Aisa , Guangmin Yao . DFT calculations and dynamic NMR revealed the coalescent NMR phenomena of the 6/6/6/9 tetracyclic merosesquiterpenoids with an unprecedented 9,15-dioxatetracyclo[8.5.3.04,17.014,18]octadecane core skeleton. Chinese Chemical Letters, 2025, 36(9): 111234-. doi: 10.1016/j.cclet.2025.111234
-
[3]
Yin-Hang Chai , Li-Long Dang . New structural breakthrough and topological transformation of homogeneous metalla[4]catenane compounds. Chinese Journal of Structural Chemistry, 2024, 43(10): 100322-100322. doi: 10.1016/j.cjsc.2024.100322
-
[4]
Shaojie Deng , Peihua Ma , Qinghong Bai , Xin Xiao . The transformation of nor-seco-cucurbit[10]uril to cucurbit[5]uril and cucurbit[8]uril controlled by its own concentration. Chinese Chemical Letters, 2025, 36(2): 109878-. doi: 10.1016/j.cclet.2024.109878
-
[5]
Yu Xia , Yangming Jiang , Xin-Long Ni , Qiaochun Wang , Daoping Wang . A macrocycle-based "Russian doll": The smallest cucurbit[4]uril in cucurbit[10]uril. Chinese Chemical Letters, 2024, 35(12): 109782-. doi: 10.1016/j.cclet.2024.109782
-
[6]
Ruizhi Yang , Xia Li , Weiping Guo , Zixuan Chen , Hongwei Ming , Zhong-Zhen Luo , Zhigang Zou . New thermoelectric semiconductors Pb5Sb12+xBi6-xSe32 with ultralow thermal conductivity. Chinese Journal of Structural Chemistry, 2024, 43(3): 100268-100268. doi: 10.1016/j.cjsc.2024.100268
-
[7]
Yatian Deng , Dao Wang , Jinglan Cheng , Yunkun Zhao , Zongbao Li , Chunyan Zang , Jian Li , Lichao Jia . A new popular transition metal-based catalyst: SmMn2O5 mullite-type oxide. Chinese Chemical Letters, 2024, 35(8): 109141-. doi: 10.1016/j.cclet.2023.109141
-
[8]
Ying Li , Long-Jie Wang , Yong-Kang Zhou , Jun Liang , Bin Xiao , Ji-Shen Zheng . An improved installation of 2-hydroxy-4-methoxybenzyl (iHmb) method for chemical protein synthesis. Chinese Chemical Letters, 2024, 35(5): 109033-. doi: 10.1016/j.cclet.2023.109033
-
[9]
Hao Sun , Xiaoxue Li , Baoyu Wu , Kai Zhu , Yinyi Gao , Tianzeng Bao , Hongbin Wu , Dianxue Cao . Direct regeneration of spent LiFePO4 cathode material via a simple solid-phase method. Chinese Chemical Letters, 2025, 36(6): 110041-. doi: 10.1016/j.cclet.2024.110041
-
[10]
Gaofeng WANG , Shuwen SUN , Lixin Meng , Dequn PENG . Syntheses and fluorescent sensing properties of two coordination polymers based on 9, 9′-dihexyl-2, 7-di(pyridin-4-yl)fluorene. Chinese Journal of Inorganic Chemistry, 2026, 42(2): 331-339. doi: 10.11862/CJIC.20250260
-
[11]
Xianchen Hu , Junli Yang , Fang Gao , Zhiyong Zhao , Simin Liu . Highly selective [4+4] cross-photodimerization of (4a-azonia)anthracenes driven by confinement of D-A hetero-guest pair in cucurbit[10]uril host. Chinese Chemical Letters, 2025, 36(3): 109967-. doi: 10.1016/j.cclet.2024.109967
-
[12]
Jindong Hao , Yufen Lv , Shuyue Tian , Chao Ma , Wenxiu Cui , Huilan Yue , Wei Wei , Dong Yi . Additive-free synthesis of β-keto phosphorodithioates via geminal hydro-phosphorodithiolation of sulfoxonium ylides with P4S10 and alcohols. Chinese Chemical Letters, 2024, 35(9): 109513-. doi: 10.1016/j.cclet.2024.109513
-
[13]
Mao-Fan Li , Ming‐Yu Guo , De-Xuan Liu , Xiao-Xian Chen , Wei-Jian Xu , Wei-Xiong Zhang . Multi-stimuli responsive behaviors in a new chiral hybrid nitroprusside salt (R-3-hydroxypyrrolidinium)2[Fe(CN)5(NO)]. Chinese Chemical Letters, 2024, 35(12): 109507-. doi: 10.1016/j.cclet.2024.109507
-
[14]
Zihan Wang , Meizhen Dai , Pengcheng Song , Wenxuan Liu , Junhua You , Fang Hu , Yusheng Wu , Kai Zhu . Triply stabilized NH4V4O10 via glycine pillaring enables universal cathode for outstanding rate aqueous zinc-ion batteries and stable aqueous ammonium-ion batteries. Chinese Chemical Letters, 2026, 37(4): 111729-. doi: 10.1016/j.cclet.2025.111729
-
[15]
Jiajun Wang , Guolin Yi , Shengling Guo , Jianing Wang , Shujuan Li , Ke Xu , Weiyi Wang , Shulai Lei . Computational design of bimetallic TM2@g-C9N4 electrocatalysts for enhanced CO reduction toward C2 products. Chinese Chemical Letters, 2024, 35(7): 109050-. doi: 10.1016/j.cclet.2023.109050
-
[16]
Lanxin Wang , Kaiwei Liang , Xuelian Yu , Guocheng Lv , Libing Liao . Facile method for creating frustrated Lewis pairs in g-C3N4 to enhance photocatalytic nitrogen fixation performance. Chinese Chemical Letters, 2026, 37(1): 110572-. doi: 10.1016/j.cclet.2024.110572
-
[17]
Keke Han , Wenjun Rao , Xiuli You , Haina Zhang , Xing Ye , Zhenhong Wei , Hu Cai . Two new high-temperature molecular ferroelectrics [1,5-3.2.2-Hdabcni]X (X = ClO4−, ReO4−). Chinese Chemical Letters, 2024, 35(6): 108809-. doi: 10.1016/j.cclet.2023.108809
-
[18]
Haiming Wu , Gaya N. Andrew , Rajini Anumula , Zhixun Luo . Corrigendum to 'How ligand coordination and superatomic-states accommodate the structure and property of a metal cluster: Cu4 (dppy)4 Cl2 vs. Cu21 (dppy)10 with altered photoluminescence' [Chin. Chem. Lett. 35 (2024) 108340]. Chinese Chemical Letters, 2024, 35(12): 109912-. doi: 10.1016/j.cclet.2024.109912
-
[19]
Jianjun Fang , Kunchen Xie , Yongli Song , Kangyi Zhang , Fei Xu , Xiaoze Shi , Ming Ren , Minzhi Zhan , Hai Lin , Luyi Yang , Shunning Li , Feng Pan . Break the capacity limit of Li4Ti5O12 anodes through oxygen vacancy engineering. Chinese Journal of Structural Chemistry, 2025, 44(2): 100504-100504. doi: 10.1016/j.cjsc.2024.100504
-
[20]
Huidan Geng , Jiuwei Nie , Wei Chen , Chong Zhao , Zikun Yao , Hui Wang , Jiquan Zhang , Lei Tang , Yuanyong Yang . A σ-π bond interchange assisted σ-π cross-metathesis reaction for nonoxidative conversion of methyl ketones to carboxylic acids. Chinese Chemical Letters, 2026, 37(4): 111277-. doi: 10.1016/j.cclet.2025.111277
-
[1]
Metrics
- PDF Downloads(6)
- Abstract views(1293)
- HTML views(21)
Login In
DownLoad: