作者:Dipakranjan Mal、Ketaki Ghosh、Soumen Chakraborty
DOI:10.1055/s-0034-1380656
日期:——
3-Isocyanoisobenzofuran-1(3H)-ones (phthalides) were prepared in two steps from the corresponding phthalaldehydic acids. The 3-isocyanoisobenzofuran-1(3H)-ones are readily rearranged to the corresponding 3-cyanoisobenzofuran-1(3H)-ones using triflic anhydride and 2,6-lutidine, thus enabling the synthesis of 3-cyanoisobenzofuran-1(3H)-ones without using toxic cyanide. Furthermore their annulation with Michael acceptors
摘要 从相应的邻苯二酸分两步制备3-异氰基异苯并呋喃-1(3 H)-一(邻苯二酚)。使用三氟甲磺酸酐和2,6-二甲基吡啶可将3-异氰基异苯并呋喃-1(3 H)-很容易地重排为相应的3-氰基异苯并呋喃-1(3 H)-,从而能够合成3-氰基异苯并呋喃-1( 3 H)-一,无需使用有毒的氰化物。此外,它们与迈克尔受体的环化导致1,4-萘醌/ 1,4-萘醌以中等产率直接形成。 从相应的邻苯二酸分两步制备3-异氰基异苯并呋喃-1(3 H)-一(邻苯二酚)。使用三氟甲磺酸酐和2,6-二甲基吡啶可将3-异氰基异苯并呋喃-1(3 H)-很容易地重排为相应的3-氰基异苯并呋喃-1(3 H)-,从而能够合成3-氰基异苯并呋喃-1( 3 H)-一,无需使用有毒的氰化物。此外,它们与迈克尔受体的环化导致1,4-萘醌/ 1,4-萘醌以中等产率直接形成。