Opportunity, chance, eager for success, ignoring danger (2)

Case 3

When a cleaner was cleaning the laboratory, because there was a large area of ​​organic dirt on the ground, in order to save trouble, the idea of ​​opportunism spontaneously emerged.

Case 4

A researcher did not build a suitable pressure reducing device when evaporating thionyl chloride under reduced pressure.

Lesson: It is not possible to perform the vacuum concentration operation of highly corrosive liquids such as thionyl chloride and phosphorus oxychloride and violent reaction with water on the rotary evaporator

Case 5

A R&D personnel performs a borohydride oxidation reaction:

The substrate 1 was dissolved in 700 mL of anhydrous THF, cooled to 0° C.

Lesson: After the reaction, you can generally use divalent or tetravalent sulfur reagents to quench (reduction) excess hydrogen peroxide, such as dilute sodium sulfite () sodium or sodium thiosulfate aqueous solution

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