A selection of resources on US sanctions and export controls against Russia in the wake of Russia's invasion of Ukraine (links to third-party websites):
"U.S., Allies Impose Further Sanctions, New Export Controls on Russia as Military Advances" (Feb. 28, 2022) by Holland & Knight LLP (Antonia I. Tzinova | Jonathan M. Epstein | Ronald A. Oleynik | Robert A. Friedman | J. Michael Cavanaugh | Andrew K. McAllister | Dariya V. Golubkova | Mackenzie A. Zales)
"Russia/Ukraine Crisis: New Tranches of U.S. Sanctions and Export Controls" (Feb. 28, 2022) by Ropes & Gray LLP (Ama A. Adams, Brendan C. Hanifin, Emerson Siegle)
"United States Responds to the Crisis in Ukraine with Additional Sanctions and Export Controls" (Feb. 28, 2022) by Gibson, Dunn & Crutcher LLP (Claire Yi, Scott R. Toussaint, Lindsay Bernsen Wardlaw, Jacob A. McGee, Sean J. Brennan, Judith Alison Lee, Adam M. Smith, and Christopher Timura)