Honestly, I think you're asking too much of him. He's 2, he's got a baby brother on the way, and when Daddy gets home, HE wants Daddy's attention. Yet, you are giving all of your attention (which was focused on your son) to Daddy, and Daddy is giving it to you. SO he MUST jump up and down and be loud in order to get attention - even if it's negative.
My suggestion, as hard as it is, is to wait until after bed time to have Daddy and Mommy time. He will have to share plenty when Baby Brother comes, but right now, he needs to have your attention.
I love Dr. Karp (Happiest Baby on the Block) and I love how he says your toddler needs TIME IN, and not TIME OUT. Instead of punishing him for behavior, be proactive and give him the attention he desperately wants ("time in") instead of reacting to the behavior he exhibits when you don't. I"m not suggesting you are ignoring him. I just know that in my house, we have learned that it's best to keep our adult conversations and our adult shows (and by "adult" I mean shows like "The Office"! LOL) to after the kidlets are in bed. It's hard for my 4 year old.
What I have started with my 4 year old (though my own 27 month old doesn't understand it) is to set a timer: Mommy and Daddy have 10 minutes after dinner is over to talk, while we plays for a bit before we wind down for the evening. It helps, because he knows that when that timer goes off, it's his time. This does not work with my 27 month old, however. DH also makes sure when he walks in the door after work to give plenty of attention to our 4 year old and 2 year old and holds the baby while I finish getting dinner on the table. We all talk during dinner, but for a few minutes after dinner, Mommy and Daddy get to talk. We've only just started this as a way to chat with each other a bit, but most of the time we just wait until the kids are in bed to watch "our" TV and have "our" time. We DVR all of our shows and watch them when we can...sometimes weeks later...together!
My 4.5 year old knew all his shapes, colors, his ABCs, and numbers to 30 before age 2, and BELIEVE ME...that doesn't make a difference in understanding the need to be quiet. IT's not about intelligence; it's about appropriate expectations!
Good luck!