Use of prepositions

[espv]

Hello,
I would like to know which of the two phrases is correct and why:
1. request of accessing to productive environment
2. request of accessing productive environment

Thank you

Best regards

Vincenzo.

[svartnik]

Hello,
I would like to know which of the two phrases is correct and why:
1. request of accessing to productive environment
2. request of accessing productive environment

Thank you

Best regards

Vincenzo.

Hello

My take on this:

request of access to productive environment
or
request of accessing productive environment