Russian Chemical Bulletin p. 1553 - 1560 (1998)
Update date:2022-08-17
Topics:
Olekhnovich
Boroshko
Tkachenko
Pozharskii
Tsupak
Zhdanov
Olekhnovick
The one-pot method for the synthesis of 4,8-dialkoxy-6-aryl-1,3-dimethylcyclohepta[c]furanium perchlorates has been developed. The method is based on the cyclocondensation of 3,4-diacetylhexane-2,5-diones with aromatic aldehydes and trialkyl orthoformates under the action of a 16% perchloric acid solution in acetic anhydride. Under similar conditions, with hydrogen sulfide, cyclohepta[c]thiophenium perchlorates have been obtained, while cyclohepta[c]pyrrolium perchlorates have been prepared with arylamines, ammonium acetate, or aliphatic amine acetates. A heteroanalog of azulene, 4,8-diethoxy-1,3-dimethyl-2-azaazulene, has been obtained for the first time. Hydrolysis of aza- and thiaazulenium salts gives the corresponding cyclohepta[c]pyrrol-4-ones and cyclohepta[c]thiophen-4-ones.
View MoreShijiazhuang Haotian Chemical Co., Ltd.
Contact:86-311-85044374
Address:293 Donggang Road
HANGZHOU YUNUO CHEMICAL CO.,LTD
website:http://www.yunuochem.com
Contact:0571-83715115
Address:hangzhou
Hangzhou Eastbiopharm Co.,Ltd.
Contact:+86-571-88931780
Address:Hangzhou,China
Nanjing chemipioneer pharmaceutical & technology Co., LTD
website:http://www.chemipioneer.com.cn
Contact:+86-25-52685700
Address:Room 305,A Block,Biological-Medicine Building,Business Start-up Center,Xin-ke 1st Road, High-tech development zone,Nanjing city,Jiangsu Province, China
Synochem Ingredients Corp., Ltd.
Contact:+86-512-5636 2180
Address:Zhangjiagang Free Trade Zone
Doi:10.1007/BF00752551
(1990)Doi:10.1021/jo502889r
(2015)Doi:10.1002/pssa.200306738
(2004)Doi:10.1016/j.jallcom.2014.09.180
(2015)Doi:10.1016/j.tetlet.2018.05.026
(2018)Doi:10.1039/c39860000393
(1986)