The question is not about who paid for the property and how.
It is about the sale deed
Since both the properties have been registered on joint names, your brother becomes an equal shareholder in both the properties.
If his name has to be removed from the title document then he has to execute a registered gift deed in your favor in respect of his share in the property which you want to have only you as an absolute owner with clear and marketable title to you alone..
With regard to the other property to which you want your wife to become the absolute owner, you and your brother have to execute a registered gift deed jointly in her favor after which she will become an absolute owner with clear and marketable title to the property.
You have to talk to your brother about this and arrive at an amicable solution to this before proceeding as suggested.