 This reaction is a one-pot synthesis and results in yields ranging from 50% to 98% depending on the substituent.The mechanism using 2-alkenylthioanilide is very similar, also starting with the formation of a bond, now between the tin radical and the sulfur.Followed by a similar radical cyclization resulting in a five membered ring, a new tin radical is produced and the original attacking radical leaves with the sulfur substituent.