Morpholinosulfur trifluoride preparation

In a similar way, but w ith morpholinosulfur trifluoride instead of diethylaminosulfur trifluoride, methyl 4,4-difluorohex-5-ynoate was prepared yield 47% bp 58-60 C/lOTorr. ... 

Dialkylaminosulfur trifluorides convert aldehydes and ketones into gtw-difluorides 1 under mild conditions.60-63 The reagent almost exclusively used is the commercially available diethyl-aminosulfur trifluoride (DAST, see Table 2). Other representatives of this class of compounds which have been employed as fluorinating agents for carbonyl compounds are dimethylamino-, piperidino-. and morpholinosulfur trifluoride, which are also commercially available. For the preparation and properties of dialkylaminosulfur trifluorides, see Vol. ElOa. p 406IT. 

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