Synthesis of Nucleosides and Related Compounds. XXXIV. Synthesis of 5-Isonitroso-1,3-dioxane-4,6-diones and Their Reactions.
作者:Nobuya KATAGIRI、Hironori NOCHI、Ayumu KURIMOTO、Hiroshi SATO、Chikara KANEKO
DOI:10.1248/cpb.42.1251
日期:——
Synthesis of 5-isonitroso-1, 3-dioxane-4, 6-dione (2 : isonitroso Meldrum's acid) and related compounds and their reactions were described. Compound (2) reacted with various alcohols to give hydroxyiminoacetic acid esters in moderate yields. Compound 2 was acetylated in the usual manner to give 5-acetoxyimino-1, 3-dioxane-4, 6-dione (9)as a stable crystalline substance, which acted not as a heterodiene but as a heterodienophile and underwent hetero Diels-Alder reaction with various dienes to form [4+2] adducts.
描述了5-异亚硝基-1, 3-二恶烷-4, 6-二酮(2:异亚硝基梅尔德鲁姆酸)及相关化合物的合成及其反应。化合物(2)与各种醇反应,以中等产率得到羟基亚氨基乙酸酯。将化合物2按照常规方式乙酰化,得到5-乙酰氧基亚氨基-1,3-二恶烷-4,6-二酮(9),为稳定的结晶物质,其不作为异二烯而是作为亲异二烯体,并经历杂Diels-Alder反应与各种二烯反应形成[4+2]加合物。