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Cesium CarbonateCAS 534-17-8 · ≥99%
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PyFluor (Pyridine-2-sulfonyl Fluoride)CAS 878376-35-3 · ≥97%
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Schreiner’s Thiourea CatalystCAS 1060-92-0 · ≥98%
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![Chemical structure of Schreiner's Thiourea Catalyst (1,3-bis[3,5-bis(trifluoromethyl)phenyl]thiourea), CAS 1060-92-0, ≥98% — a thiourea flanked by two 3,5-bis(trifluoromethyl)phenyl groups (C17H8F12N2S); the four CF3 groups acidify its N-H protons into a strong double hydrogen-bond donor. The archetypal achiral hydrogen-bond-donor organocatalyst, it activates carbonyls, nitroalkenes and imines, as exploited in Schreiner's acid-free acetalization of aldehydes. Supplied by NorrChemica with DDP shipping. CoA](http://www.norrchemica.com/cdn/shop/files/NorrChemica_SchreinerThiourea_v2.png?v=1782881575&width=533)
