US 11,905,267 B2
High triplet yield phenothiazine donor-acceptor complexes for photoredox catalysis
Steven Sartor, Boulder, CO (US); Niels Damrauer, Boulder, CO (US); Garet Miyake, Fort Collins, CO (US); Cameron Chrisman, Fort Collins, CO (US); and Ryan Pearson, Berkeley, CA (US)
Assigned to THE REGENTS OF THE UNIVERSITY OF COLORADO, A BODY CORPORATE, Denver, CO (US); and COLORADO STATE UNIVERSITY RESEARCH FOUNDATION, Fort Collins, CO (US)
Appl. No. 17/789,874
Filed by The Regents of the University of Colorado, Denver, CO (US); and Colorado State University Research Foundation, Fort Collins, CO (US)
PCT Filed Jan. 8, 2021, PCT No. PCT/US2021/012732
§ 371(c)(1), (2) Date Jun. 29, 2022,
PCT Pub. No. WO2021/142287, PCT Pub. Date Jul. 15, 2021.
Claims priority of provisional application 62/958,611, filed on Jan. 8, 2020.
Prior Publication US 2023/0100472 A1, Mar. 30, 2023
Int. Cl. C07D 279/30 (2006.01); C07D 279/24 (2006.01)
CPC C07D 279/30 (2013.01) [C07D 279/24 (2013.01)] 14 Claims
 
1. A compound of Formula I:

OG Complex Work Unit Chemistry
wherein:
each of A1, A2, and A3 is independently an optionally substituted C6-18 aryl,
wherein the optional substitution is from 1 to 12 groups selected from the group consisting of hydrogen, F, Cl, Br, I, OR, CN, NO, NO2, ONO2, CF3, OCF3, R, N(R)2, SR, SOR, SO2R, SO2N(R)2, SO3R, C(O)R, C(S)R, C(O)OR, OC(O)R, C(O)N(R)2, OC(O)N(R)2, and C(S)N(R)2;
wherein R is independently at each occurrence hydrogen or C1-10 hydrocarbyl,
provided that the compound of Formula I is not:

OG Complex Work Unit Chemistry
or salts thereof, wherein G is

OG Complex Work Unit Chemistry