221360-86-7Relevant articles and documents
A practical method for the preparation of 4-nitrogen-substituted benzoic acids
Shinozuka, Tsuyoshi,Nakao, Akira,Saito, Keiji,Naito, Satoru
, p. 1090 - 1091 (2007/10/03)
An efficient and practical method for the preparation of 4-nitrogen-substituted benzoic acids is described. Our method consists of the aromatic substitution of 2,2,2,4′-tetrafluoroacetophenone with amines, followed by haloform reaction to the benzoic acids. In this method, even though for the less nucleophilic 7-, 8-, and 9-membered amines 1 equiv. was used, corresponding benzoic acids were obtained in moderate to excellent yield. As the experimental procedure including purification is simple, this method is applicable to large-scale syntheses. Copyright
Substituted chroman derivatives
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, (2008/06/13)
The present invention relates to new new piperidyl or piperazinyl-substituted dihydro-2H-1-benzopyran derivatives compound having the formula (I) wherein X is N or CH; Y is NR2CH2, CH2NR2, NR2CO, CONR