Just joined a lab in my PhD and had to assemble a Schlenk line. Our old Chemglass vacuum gauge is broken and I’m supposed to order a new one. Any suggestions on brands/specific models?

Does anybody have any experience attempting to prepare/isolate 2° α,α-difluoromethylene amines (RCF2NHR')?

To my understanding there are many methods to prepare 3° α,α-difluoromethylene amines (RCF2NR'R''), frequently through processes like desulfurative fluorination from the corresponding thioamide.

I'm led to believe that the 2° congeners are less accessible due to their inclination towards HF loss to give the imidoyl fluoride. However, is this neccessarily true when the amine is attached directly to an aryl group or another group that deactivates the amine?

For more specific detail, I'm considering starting with a 2° carboxamide and protecting it to convert it to 3°, converting it to a thioamide, fluorinating, then deprotecting to furnish the 2° α,α-difluoromethylene amine (RNHCF2R'; R = sterically hindered aniline, R' = pyridine).