[grammar] this requires of sb + ?

I'm not clear what you're looking for. Can you explain a little more?

Blue JayI'm not clear what you're looking for. Can you explain a little more?

Sure. I don't know if the pattern here would be:

1) The process requires of participants to put in some effort.
2) The process requires of participants put in some effort.

The process requires of participants that they put in some effort.

Blue JayThe process requires of participants that they put in some effort.

Thank you Blue Jay.

Is there an explanation or a rule behind it? I'd like to know why I can't say it the way I did.

You can say:
The process requires participants to put in some effort.
The process requires that participants put in some effort.
The process requires participants putting in some effort. (I don't like this one as much)
Looking at your sentences, #2 doesn't work at all. #1 seems awkward, but not as bad. I think the of

Perhaps I'm misreading this, but does it mean that of shouldn't be used after require?

Not exactly. I meant that require of (somebody) should be followed by that. If you want to follow require (somebody) with an infinitive you should omit the of.

Thanks. Now it's all clear.