Mo. Rev. Stat. § 527.260
In any civil action, based on any equitable right, claim or lien, affecting or designed to affect real estate, the plaintiff shall file for record, with the recorder of deeds of the county in which any such real estate is situated, a written notice of the pendency of the suit, stating the names of the parties, the style of the action and the term of the court to which such suit is brought, and a description of the real estate liable to be affected thereby; and the pendency of such suit shall be constructive notice to purchasers or encumbrancers, only from the time of filing such notice. The recorder shall note the time of receiving such notice, and shall record and index the same in like manner as deeds of real estate are required to be recorded and indexed.
§ 527.260, RSMo
RSMo 1939 § 3545