N.Y. Est. Powers & Trusts Law § 3-3.8

§ 3-3.8 Validity of a purchase of real property notwithstanding its\n disposition by will\n The title of a purchaser of real property, in good faith and for\nvaluable consideration, from a distributee of a person who died owning\nsuch property shall not be affected by a testamentary disposition of\nsuch property by the decedent, unless within two years after the\ntestator's death the will disposing of the property is admitted to\nprobate. If, however, at the time of the testator's death, the devisee\nis either an infant, incompetent, imprisoned for a term less than life,\nwithout the state or if the will was concealed by one or more of the\ndistributees of the decedent, the two year period prescribed herein does\nnot commence until the expiration of one year from the time of the\nremoval of such disability or the delivery of the will to the devisee or\nto the surrogate having jurisdiction to admit the will to probate.\n