US 11,746,283 B2
Silole and germole fused ring photochromic compounds
Ryan Stayshich, Pittsburgh, PA (US); and Robert W. Walters, Murrysville, PA (US)
Assigned to Transitions Optical, Ltd., Tuam (IE)
Appl. No. 16/622,033
Filed by Transitions Optical, Ltd., Tuam (IE)
PCT Filed Jun. 30, 2017, PCT No. PCT/EP2017/066260
§ 371(c)(1), (2) Date Dec. 12, 2019,
PCT Pub. No. WO2019/001724, PCT Pub. Date Jan. 3, 2019.
Prior Publication US 2020/0172798 A1, Jun. 4, 2020
Int. Cl. C09K 9/02 (2006.01); C07F 7/08 (2006.01); G02C 7/10 (2006.01)
CPC C09K 9/02 (2013.01) [C07F 7/0816 (2013.01); C09K 2211/1018 (2013.01); G02C 7/102 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A photochromic compound represented by the following Formula (IIb),

OG Complex Work Unit Chemistry
wherein,
R1 independently for each n, and R2 independently for each m, are selected from the group consisting of,
hydrogen;
linear or branched C1-C6 alkyl;
substituted or unsubstituted C3-C6 cycloalkyl;
linear or branched C1-C8 perhaloalkyl;
—O—R10′, and
substituted or unsubstituted phenyl;
wherein each cycloalkyl substituent, and each phenyl substituent, is independently selected from the group consisting of at least one of linear or branched C1-C6 alkyl, —O—R10′, and combinations thereof, where each R10′ is independently as described as follows;
wherein each R10′, of —O—R10′, is hydrogen, or linear or branched C1-C6 alkyl;
M is Si or Ge;
R3 and R4 are each independently selected from the group consisting of, hydrogen; and linear or branched C1-C8 alkyl; and
B and B′ are in each case independently selected from the group consisting of,
unsubstituted phenyl,
phenyl substituted with linear or branched C1-C6 alkoxy,
phenyl substituted with linear or branched C1-C6 perhaloalkyl,
phenyl substituted with morpholino, and
phenyl substituted with piperidino.