This invention relates to piperazine derivatives of the formula:
wherein each symbol is as defined in the description, and its pharmaceutically acceptable salt, to processes for preparation thereof, to pharmaceutical composition comprising the same, and to a use of the same for treating or preventing Tachykinin-mediated diseases in human being or animals.
This invention relates to piperazine derivatives of the formula:
wherein each symbol is as defined in the description, and its pharmaceutically acceptable salt, to processes for preparation thereof, to pharmaceutical composition comprising the same, and to a use of the same for treating or preventing Tachykinin-mediated diseases in human being or animals.
This invention relates to piperazine derivatives of formula (I) wherein each symbol is as defined in the description, and its pharmaceutically acceptable salt, to processes for preparation thereof, to pharmaceutical composition comprising the same, and to a use of the same for treating or preventing Tachykinin-mediated diseases in human being or animals.
A diastereoselective construction of pyrazinoisoquinoline skeletons via tandem cyclization of phenylalanine derivatives: a facile synthesis of optically active pyrazinoisoquinolines
作者:Maki Seki、Tsuyoshi Ogiku
DOI:10.1016/j.tet.2014.04.045
日期:2014.6
A facile and stereocontrolled construction of optically active pyrazinoisoquinoline skeletons based on tandemcyclization of enantiopure phenylalanine derivatives was examined. The reaction provided optically active 6,11b-trans pyrazinoisoquinoline ring systems in excellent diastereoselectivity, and this method was applicable to the cyclization of phenylalanine derivatives with diverse substituents