Copy synchronous response to separate asynchronous mapping

Hi Folks

I have a integration scenario challenge, that I was sure could be implemented technically. But after searching the communicty and google in general, I still havent found a solution. Therefore I would like to hear if any of you have any input to this challenge..

The requirement is pretty simple: System A make a synchronous request to System B. Response should be synchronous returned to System A, but System C should get a asynchronous copy of the response.

Illustrated like this:

However I cant find any way of copying the response and forward it to the asynchronous integration.

Anyone having any suggestions to how this can be achieved.. (Or if it is possible at all)

Thanks a lot for your input.

/Chris