Furopyridines.<b>XIX</b>. Reaction of furo[2,3-<i>b</i>]-, -[3,2-<i>b</i>]-, -[2,3-<i>c</i>]- and -[3,2-<i>c</i>]pyridine with acetic anhydride
作者:Shunsaku Shiotani、Katsunori Taniguchi、Toshimasa Ishida、Yasuko In
DOI:10.1002/jhet.5570330321
日期:1996.5
Acetoxylation of N-oxide of furo[2,3-b]- 2a, -[3,2-b]- 2b, -[2,3-c]- 2c and -[3,2-c]pyridine 2d with acetic anhydride afforded compounds substituted normally at the α- or γ-position to the ring nitrogen, 3a, 4a, 4b, 3d, 4d, 8 and 9, and in addition compounds substituted on the furan ring, 5a, 6a, 5b, 6b, 7b, 5c and 7c which were unexpected compounds. The structures of these compounds were established
的乙酰氧基化Ñ呋喃并[2,3的氧化物b ] -图2a, - [3,2- b ] - 2B, - [2,3- Ç ] - 2C和- [3,2- c ^ ]吡啶2D与乙酸酐可提供通常在环氮的3a,4a,4b,3d,4d,8和9的α-或γ位置上取代的化合物,以及在呋喃环上的5a,6a,5b,6b上取代的化合物,7b,5c和7c是意外化合物。这些化合物的结构由ir,nmr和质谱以及5b的x射线晶体分析确定。