Furopyridines.<b>XXIII</b>. Synthesis and reactions of chloropyridine derivatives of furo[2,3-<i>b</i>]-, -[2,3-<i>c</i>]- and -[3,2-c]pyridine
作者:Shunsaku Shiotani、Katsunori Taniguchi
DOI:10.1002/jhet.5570340333
日期:1997.5
Chlorination of the N-oxides of furo[2,3-b]- 1a, -[2,3-c]- 1b and -[3,2-c]pyridine 1c with phosphorus oxychloride afforded compounds substituted normally at the α- or λ-position to the ring nitrogen, 2a, 2′a, 2b, 2c, 2′c and 2′c, and in addition, in the case of 1b, compounds substituted on the furan ring, 2′b and 2″b. The structures of these compounds were confirmed from their ir, nmr and mass spectra
所述的氯化Ñ呋喃并[2,3-的-oxides b ] - 1A, - [2,3- Ç ] - 1B和- [3,2-c]吡啶1C与三氯氧化磷,得到的化合物通常是在α-取代或在环氮的λ位置2a,2'a,2b,2c,2'c和2'c,此外,在1b的情况下,在呋喃环上取代的化合物2'b和2'' b。这些化合物的结构由其ir,nmr和质谱确定。将主要的氯化产物2a,2b和2c转化为甲氧基5a,5b和5c,N-吡咯烷基-7a,7b和7c以及苯硫呋喃吡啶8a,8b和8c。