See also Richardson Securities v. Lau, 825 F.2d 647 (1987).
We believe that the district judge usurped power when she prevented the Laus from filing a motion for leave to amend their answer. Absent extraordinary circumstances, such as a demonstrated history of frivolous and vexatious litigation, see In re Martin-Trigona, 737 F.2d 1254, 1261-62 (2d Cir.1984), or a failure to comply with sanctions imposed for such conduct, Johl v. Johl, 788 F.2d 75 (2d Cir.1986) (per curiam), a court has no power to prevent a party from filing pleadings, motions or appeals authorized by the Federal Rules of Civil Procedure. The actions of the district court effectively prevented the Laus from filing a motion for leave to amend. The refusal to permit a motion to be filed without a prior conference, followed by a failure to hold such a conference until nearly five months after one was first requested, and then by a denial of the motion for having been filed too late, are actions so "at odds with the purpose and intent of [the Federal Rules]," Padovani v. Bruchhausen, 293 F.2d 546, 548 (2d Cir.1961), as to warrant mandamus relief.5