US 11,999,762 B2
Phosphine precursor for preparing quantum dot and quantum dot prepared therefrom
Jeong Ho Park, Gyeonggi-do (KR); Hee Il Chae, Seoul (KR); Kyung Sil Yoon, Gyeonggi-do (KR); Ju-Sik Kang, Gyeonggi-do (KR); Yu Mi Chang, Gyeonggi-do (KR); Nam-Choul Yang, Seoul (KR); Jae Kyun Park, Seoul (KR); and Song Lee, Seoul (KR)
Assigned to SK Chemicals Co., Ltd., (KR)
Filed by SK CHEMICALS CO., LTD., Gyeonggi-do (KR)
Filed on Apr. 7, 2022, as Appl. No. 17/715,470.
Application 17/715,470 is a division of application No. 16/613,884, abandoned, previously published as PCT/KR2018/005627, filed on May 16, 2018.
Claims priority of application No. 10-2017-0061800 (KR), filed on May 18, 2017.
Prior Publication US 2022/0235077 A1, Jul. 28, 2022
Int. Cl. C07F 9/06 (2006.01)
CPC C07F 9/06 (2013.01) 6 Claims
 
1. A method for preparing a phosphine precursor represented by the following Chemical Formula 1, comprising the steps of:
preparing a mixture of (i) a primary phosphine compound having the formula Q1PH2 or a secondary phosphine compound having the formula Q1Q2PH, (ii) an ether solvent, and (iii) alkyl lithium; and
adding a silyl halide compound to the mixture:

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in the Chemical Formula 1,
Q1 is

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Q2 iS

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Q3 is

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wherein R1 to R9 are identical to or different from each other, and each independently, C1-20 linear or branched alkyl, C6-30 aryl, C7-30 alkylaryl, or C7-30 arylalkyl, and
wherein at least one pair selected from the group consisting of (i) Q1 and Q2, (ii) Q1 and Q3, and (iii) Q2 and Q3 are different from each other.