Hello, my name is ***** ***** I will be the immigration attorney helping you today.
Unfortunately, you are not entitled to a work permit once your I-485 has been denied even if you have reconsideration pending. You can certainly try to apply and you have nothing to lose since there is no fee. I have seen cases here and there where the application slips through to an officer who may not have noticed the I-485 is denied and have approved the work permit. However, legally no you are not entitled to you.
As far as whether you have authorization to work without the permit, legally no, you are not authorized if the permit expired. However, it is up to your employer to ask for the updated information.
Good luck to you and I hope this answer has helped you!
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