I like to build boost 1.58.0 using the (new) Visual Studio 2015 (Enterprise). In the past I proceeded in the following way:
I Tried to install Qt and I had the same issue: vcvarsall.bat was missing. In my case the problem was that I unchecked The Visual C++ Common Tools.
I modified my VS 2015 installation and added the missing feature Common Tools for Visual C++ 2015:
After the modification, the File is in C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC