How to wrap rounded corner rectangle around a circle

[Dr. Hans W.]

I'm trying to wrap rounded corner rectangles around in a circle like the image below.  Any ideas on how to get that done?  Thanks!! 

[Monika Gause]

I would use dashed strokes

For the large ones in the center:

Make a fat stroke, expand the stroke, subtract a rectangle from it and then select just some corners and round them with the widgets.