Cite

    Hisanori Nambu et al.. “An efficient synthesis of cycloalkane-1, 3-dione-2-spirocyclopropanes from 1, 3-cycloalkanediones using (1-aryl-2-bromoethyl)-dimethylsulfonium bromides: application to a one-pot synthesis of tetrahydroindol-4(5H)-one.” Tetrahedron letters, vol. 56, no. 29, 2015, pp. 4312–4315. http://access.bl.uk/ark:/81055/vdc_100042266692.0x00004c