三硒硼氢化钠（ＮａＢＨ２Ｓｅ３）是一种新型还原剂，其还原能力强于硼氢化钠（ＮａＢＨ４）．在乙腈（ＣＨ３ＣＮ）溶剂中，它可直接还原芳基磺酰氯（ＡｒＳＯ２Ｃｌ）至相应的二硫化物（ＡｒＳＳＡｒ），产率比单独使用ＮａＢＨ４作还原剂的高．在二甲基甲酰胺（ＤＭＦ）溶剂中，也可将芳基亚磺酸钠（ＡｒＳＯ２Ｎａ）、芳基磺酸酯（ＡｒＳＯ３Ａｒ′）直接还原为相应的二硫化物，而在同样的条件下，单独用ＮａＢＨ４却不能还原芳基亚磺酸钠和芳基磺酸酯 Sodium selenium borohydride (NaBH2Se3) is a new type of reducing agent, its reducing ability is stronger than sodium borohydride (NaBH4). In acetonitrile (CH3CN) solvent, it can directly reduce arylsulfonyl chloride (ArSO2Cl) to the corresponding disulfide (ArSSAr) in higher yield than using NaBH4 alone as reductant. In dimethylformamide (DMF) solvents, sodium arylsulfinate (ArSO2Na) and aryl sulfonate (ArSO3Ar ’) can also be directly reduced to the corresponding disulfides. Under the same conditions, NaBH4 alone failed to reduce sodium arylsulfinate and aryl sulfonate