An often mentioned technique for making a philanthropic gift and preserving wealth for distribution is to utilize a charitable remainder unitrust (CRUT), coupled with an irrevocable life insurance trust (ILIT) funded with life insurance. This becomes a win-win situation whereby the donor accomplishes a charitable gift to his or her favorite charity through the remainder interest of the CRUT.
Thomas, Allen, "Philanthropy Coupled with Wealth Replacement" (2012). Faculty Publications. 355.