%0 Journal Article %T An efficient synthesis of novel spiro[indole-3,8′-pyrano[2,3-d][1,3,4]thiadiazolo[3,2-a]pyrimidine derivatives via organobase-catalyzed three-component reaction of malononitrile, isatin and heterocyclic-1,3-diones %A Hosseini, Saedehsadat %A Esmaeili, Abbas Ali %A Khojastehnezhad Golmakani, Amir %A Behrouz Notash %J Journal of Sulfur Chemistry %@ 1741-5993 %D 2021