Strategy Analysis of ynones’ Radical Reactions

2021 ◽  
Vol 18 ◽  
Author(s):  
Kaijun Chen ◽  
Dayun Huang ◽  
Xiangyu Sun
Keyword(s):  
Intramolecular Cyclization ◽  
Radical Addition ◽  
Radical Reactions ◽  
Future Research ◽  
Strategy Analysis ◽  
Substantial Progress

: This review highlights the multifaceted synthetic applications of ynones in radical reactions. Substantial progress has been made over the last decade (2010-2020) in the utilization of ynones. Herein, the chemistry of ynones is divided into three sections based on the classes of critical mechanistic insights: (1) radical addition and intramolecular cyclization; (2) radical addition and intermolecular annulation; (3) radical addition and coupling. We hope that this review will promote future research in this area.

Visible-light-facilitated P-center radical addition to C=X (X = C, N) bonds results in cyclizations

2021 ◽  
Author(s):  
Shang-Dong Yang ◽  
Chong Li ◽  
Juan Wang
Keyword(s):  
Visible Light ◽  
Organophosphorus Compounds ◽  
Radical Addition ◽  
Radical Reactions

Visible-light-facilitated phosphorus radical reactions have been developed as a powerful and sustainable tool for the synthesis of various organophosphorus compounds. In general, these reactions require stoichiometric amounts of oxidants, and...

Highly Diastereoselective Radical Reactions of Substituted Methylideneimidazolidinones and Related Systems

2004 ◽  
Vol 57 (7) ◽  
pp. 629 ◽  
Author(s):  
George A. Adamson ◽  
Athelstan L. J. Beckwith ◽  
Christina L. L. Chai
Keyword(s):  
Radical Addition ◽  
Radical Reactions

Stannane-mediated radical addition to methylideneimidazolidinones occurs with good to excellent diastereo-selectivity. The stereochemical outcome of addition is highly dependent on the nature of the N1 substituent on the imidazolidinone ring.

Solid-phase intermolecular radical reactions 1. Sulfonyl radical addition to isolated alkenes and alkynes

1999 ◽  
Vol 40 (40) ◽  
pp. 7285-7288 ◽  
Author(s):  
Stephen Caddick ◽  
Daniel Hamza ◽  
Sjoerd N Wadman
Keyword(s):  
Solid Phase ◽  
Radical Addition ◽  
Radical Reactions

scholarly journals Geographic Question Answering: Challenges, Uniqueness, Classification, and Future Directions

2021 ◽  
Vol 2 ◽  
pp. 1-21
Author(s):  
Gengchen Mai ◽  
Krzysztof Janowicz ◽  
Rui Zhu ◽  
Ling Cai ◽  
Ni Lao
Keyword(s):  
Artificial Intelligence ◽  
Natural Language ◽  
Question Answering ◽  
Future Research ◽  
Open Domain ◽  
Future Directions ◽  
Research Directions ◽  
Classification Framework ◽  
Substantial Progress ◽  
Future Research Directions

Abstract. As an important part of Artificial Intelligence (AI), Question Answering (QA) aims at generating answers to questions phrased in natural language. While there has been substantial progress in open-domain question answering, QA systems are still struggling to answer questions which involve geographic entities or concepts and that require spatial operations. In this paper, we discuss the problem of geographic question answering (GeoQA). We first investigate the reasons why geographic questions are difficult to answer by analyzing challenges of geographic questions. We discuss the uniqueness of geographic questions compared to general QA. Then we review existing work on GeoQA and classify them by the types of questions they can address. Based on this survey, we provide a generic classification framework for geographic questions. Finally, we conclude our work by pointing out unique future research directions for GeoQA.

Telecommunication Customer Detainment Management

2010 ◽  
pp. 379-399 ◽  
Author(s):  
Jiayin Qi ◽  
Yuanquan Li ◽  
Chen Li ◽  
Yingying Zhang
Keyword(s):  
Management Strategy ◽  
Future Research ◽  
Value Assessment ◽  
Churn Prediction ◽  
Strategy Formulation ◽  
Strategy Analysis ◽  
Customer Churn ◽  
Customer Churn Prediction

This chapter proposes an integrated methodological system of telecommunication customer detainment management, including telecommunication customer churn prediction and strategy formulation of customer detainment management. The formulation of churn customer detainment management strategy includes customer detainment value assessment, customer detainment level determination, enterpriseattribution approach based on customer detainment strategy analysis, evaluation and implementation, and so forth. Future research in this field is discussed at the end of this chapter.

Telecommunication Customer Detainment Management

2010 ◽  
pp. 1149-1169
Author(s):  
Jiayin Qi ◽  
Yuanquan Li ◽  
Chen Li ◽  
Yingying Zhang
Keyword(s):  
Management Strategy ◽  
Future Research ◽  
Value Assessment ◽  
Churn Prediction ◽  
Strategy Formulation ◽  
Strategy Analysis ◽  
Customer Churn ◽  
Customer Churn Prediction

This chapter proposes an integrated methodological system of telecommunication customer detainment management, including telecommunication customer churn prediction and strategy formulation of customer detainment management. The formulation of churn customer detainment management strategy includes customer detainment value assessment, customer detainment level determination, enterpriseattribution approach based on customer detainment strategy analysis, evaluation and implementation, and so forth. Future research in this field is discussed at the end of this chapter.

α-Csp3–H bond functionalization of simple ethers in radical reactions

Synthesis ◽  
2021 ◽  
Author(s):  
Yanping Feng ◽  
Xiajuan Ye ◽  
Dayun Huang ◽  
Sheng-rong Guo
Keyword(s):  
Radical Addition ◽  
Radical Reactions ◽  
Bond Functionalization ◽  
Unsaturated Compounds ◽  
Metal Catalyzed

The direct α-Csp3-H functionalization of simple ethers has emerged as one of the vital strategies among radical reactions. This review discusses their applications according to the starting materials: (1) reactions with alkenes or alkynes. (2) reactions with other unsaturated compounds. (3) reactions with nucleophilic partners. Mechanisms like radical addition, elimination, oxidation, metal-catalyzed coupling, C-H activation, cyclization and rearrangement will be discussed herein.

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