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The use of triethylsilane as a carbocation scavenger in the presence of trifluoroacetic acid in dichloromethane has been shown to lead to increased yields, decreased reaction times, simple work-up and improved selectivity for the deprotection of t-butyl ester and t-butoxycarbonyl sites in protected amino-acids and peptides in the presence of ...
The use of protective groups is pervasive but not without criticism. [103] In practical terms their use adds two steps (protection-deprotection sequence) to a synthesis, either or both of which can dramatically lower chemical yield. Crucially, added complexity impedes the use of synthetic total synthesis in drug discovery.
In Fall 1995 Paskov and Traub published a paper [11] in The Journal of Portfolio Management. They compared MC and two QMC methods. The two deterministic methods used Sobol and Halton low-discrepancy points. Since better LDS were created later, no comparison will be made between Sobol and Halton sequences.
Business and management research is a systematic inquiry that helps to solve business problems and contributes to management knowledge. It Is an applied research. Four factors (Easterby-Smith, 2008) combine to make business and management a distinctive focus for research : Transdiscipline approach
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The United States deported 119 people of different nationalities to Panama as part of an agreement between the administration of U.S. President Donald Trump and the Central American nation, Panama ...
Financial cryptography is the use of cryptography in applications in which financial loss could result from subversion of the message system. Financial cryptography is distinguished from traditional cryptography in that for most of recorded history, cryptography has been used almost entirely for military and diplomatic purposes.
Alabama executed Demetrius Terrance Frazier by nitrogen gas on Thursday, making him the fourth inmate in the U.S. to be put to death by the controversial method since Alabama began using it last year.