Browsing by Author "Sun, Qi"
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Item Photocatalytic radical defluoroalkylation of unactivated alkenes via distal heteroaryl ipso-migration(2020) Yuan, Xin; Zhuang, Kai Qiang; Cui, Yu Sheng; Qin, Long Zhou; Sun, Qi; Duan, Xiu; Chen, Lin; Zhu, Ning; Li, Guigen (TTU); Qiu, Jiang Kai; Guo, KaiCurrently, the selective activation of C(sp3)–F bonds and C–C bonds constitute one of the most widely used procedures for the synthesis of high-value products that range from pharmaceuticals to agrochemical applications. While numerous examples of these two methods have been reported in their respective fields, the processes which merge the activation of both single C(sp3)-F bonds and C–C bonds in one step still remain elusive. Here, we demonstrate the controllable defluoroalkylation–distal functionalization of trifluoromethylarenes with unactivated alkenes via distal heteroaryl migration. This is proposed to proceed via tandem C(sp3)–F and C–C bond cleavage using visible-light photoredox catalysis combined with Lewis acid activation. This strategy provides facile and flexible access to multiply functionalized α,α-difluorobenzylic ketones in useful yields (up to 88%) under mild conditions. The products can be further transformed into other valuable compounds, demonstrating the method’s utility.Item Three essays on longevity insurance and households' asset allocation decisions throughout the life cycle(2021-12) Sun, Qi; Guillemette, Michael A.; Lacombe, Donald; Browning, Chris; Salter, John; Blanchett, DavidSaving for retirement is one of the most important financial goals when individuals talk about their financial plans with financial advisors. It is critical to understand individuals’ retirement portfolio composition and why they make such decisions. The following three essays explore how individuals value annuitized income as part of their retirement portfolios from different perspectives. The first two essays focus on the demand for annuity products driven by the future expectation of social security income and tax incentives. The third essay focus on how labor income risk associated with job industries influences stock market participation for annuity owners and non-annuity owners. The first essay uses the 2016 wave of the Health and Retirement Study (HRS). The HRS is a survey of Americans aged 50 and older and includes individuals’ financial information. This essay analyzes the relationship between households' attitudes toward future social-security benefits and their ownership of annuities. The second essay uses the 2019 wave of the Survey of Consumer Finance (SCF). This essay analyzes the relationship between households' incentives to maximize tax-advantaged contributions to 401(k) accounts and their ownership of variable annuities. The third essay used the 2018 wave of Health and Retirement Study (HRS) and the macro industry average unemployment rate between April 2018 and April 2019 from the Bureau of Labor Statistics. This essay explores the relationship between annuity ownership and stock market participation depending on industry-related unemployment risk.