Name: Isobenzofuran-1(3H)-one. Wang, J; Li, X; Cheng, JP in [Wang, Jie; Li, Xin; Cheng, Jin-Pei] Nankai Univ, State Key Lab Elementoorgan Chem, Collaborat Innovat Ctr Chem Sci & Engn, Coll Chem, Tianjin 300071, Peoples R China published Quinine-derived thiourea promoted enantioselective Michael addition reactions of 3-substituted phthalides to maleimides in 2019, Cited 44. The Name is Isobenzofuran-1(3H)-one. Through research, I have a further understanding and discovery of 87-41-2.
A highly diastereoselective and enantioselective Michael addition/desymmetrization reaction of maleimides with prochiral 3- substituted phthalides catalyzed by quinine-derived bifunctional thiourea was realized. A broad range of the 3,3-disubstituted phthalides bearing vicinal quaternary-tertiary stereogenic centers were synthesized in moderate to good yields (up to 96%) with high diastereoselectivities (up to >19:1 dr) and enantioselectivities (up to 96:4 er).
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Reference:
Benzofuran – Wikipedia,
,Benzofuran | C8H6O – PubChem