Regioselective Metalation of Ortho-Aminopicolines Using the Pivaloyl Group as a Directing Group: Synthesis of Naphthyridines
摘要:
2-(1,3-Dioxan-2-yl)-3-methyl-4- and 2-chloro-3,4-dimethyl-5-pivaloylaminopyridines were prepared and converted to 1,6- and 1,7-naphthyridines via regioselective lithiation of the ortho-methyl group, reaction with 2,2-diethoxyacetophenone and subsequent acid-catalyzed cyclization.
Regioselective Metalation of Ortho-Aminopicolines Using the Pivaloyl Group as a Directing Group: Synthesis of Naphthyridines
摘要:
2-(1,3-Dioxan-2-yl)-3-methyl-4- and 2-chloro-3,4-dimethyl-5-pivaloylaminopyridines were prepared and converted to 1,6- and 1,7-naphthyridines via regioselective lithiation of the ortho-methyl group, reaction with 2,2-diethoxyacetophenone and subsequent acid-catalyzed cyclization.
4-cinnolinyl- and 4-naphthyridinyl-dihydropyridines, processes for their
申请人:Bayer Aktiengesellschaft
公开号:US05364855A1
公开(公告)日:1994-11-15
The invention relates to new 4-cinnolinyl- and 4-naphthyridinyl-dihydropyridines of the general formula I ##STR1## in which R.sup.1 to R.sup.5 have the meaning given in the description, to processes for their preparation and to their use in medicaments, in particular in compositions having positively inotropic action.
Neue 4-Cinnolinyl- und 4-Naphthyridinyl-dihydropyridine, Verfahren zur ihrer Herstellung und ihre Verwendung in Arzneimitteln
申请人:BAYER AG
公开号:EP0555657A1
公开(公告)日:1993-08-18
Die Erfindung betrifft neue 4-Cinnolinyl- und 4-Naphthyridinyl-dihydropyridine der allgemeinen Formel I
in welcher R¹ bis R⁵ die in der Beschreibung angegebene Bedeutung haben, Verfahren zu ihrer Herstellung und ihre Verwendung in Arzneimitteln, insbesondere in Mitteln mit positiv inotroper Wirkung.
本发明涉及通式 I 的新型 4-噌啉基和 4-萘啶基二氢吡啶
中 R¹ 至 R⁵ 的含义、其制备工艺及其在药物中的用途,特别是在具有正性肌力作用的制剂中的用途。
US5364855A
申请人:——
公开号:US5364855A
公开(公告)日:1994-11-15
US5410055A
申请人:——
公开号:US5410055A
公开(公告)日:1995-04-25
Regioselective Metalation of Ortho-Aminopicolines Using the Pivaloyl Group as a Directing Group: Synthesis of Naphthyridines
作者:Alexander Straub
DOI:10.1080/00397919308009790
日期:1993.2
2-(1,3-Dioxan-2-yl)-3-methyl-4- and 2-chloro-3,4-dimethyl-5-pivaloylaminopyridines were prepared and converted to 1,6- and 1,7-naphthyridines via regioselective lithiation of the ortho-methyl group, reaction with 2,2-diethoxyacetophenone and subsequent acid-catalyzed cyclization.