A. Jasper Moore, 71, vice chairman of the board of Frederick W. Berens Sales Inc., a division of the De Franceaux Realty Group here, died of liver failure Saturday at Sibley Memorial Hospital.

Mr. Moore became president of Berens Sales in 1970. It was acquired by the DeFranceaux Realty Group in about 1972. Upon his retirement in 1975, he was named vice chairman of the board and special consultant.

He entered the real estate business in 1926 as a clerk with Shannon & Luchs realty and was vice president of the company from 1938 until 1958. He then joined Berens Sales as executive vice president, where he was involved in many large real estate transactions here during the 1960s, including the sales of the old Washington Star building on Pennsylvania Avenue and the Dupont Plaza Hotel.

A native of Washington, Mr. Moore graduated from Mckinley Technical High School. In 1933, he earned a law degree from the old Columous University School of Law (now Catholic University's law school).

He was a past regional vice president of the National Association of Real Estate Boards, and a director of the Washington Real Estate Board. He also was a past president of the Washington Chapter of the American Society of Appraisers.

Mr. Moore lectured on real estate at American University, Southeastern University and Catholic University and served as an instructor for the D.C. Real Estate Commission.

He was a trustee of Trinity College and the Catholic Youth Organization of Washington.

Mr. Moore was a longtime resident of Chevy Chase. He was a member of the Touchdown Club, Columbia Country Club and the Congressional Country Club.

His wife of 51 years, Eugenia F., died in April.

Survivors include a daughter, Eugenia Walter, of Williamsburg, Va.; a son, Willian J., of McLean; a brother, Archie E., of District Heights; three sisters, Virginia Knode, of Temple Hills, and Frances Percifield and Kathryn McCurdy, both of Albuquerque, N.M., and 10 grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to the Touchdown Club Charities or to the Sacred Heart Home in Hyattsville.