Jong Mi Kim

Selective reduction with lithium bis- or tris(dialkylamino)aluminum hydrides. III. Reduction of primary carboxamides to aldehydes by lithium tris(diethylamino)aluminum hydride

Abstract Both aliphatic and aromatic primary carboxamides are reduced readily to the corresponding aldehydes by lithium tris(diethylamino)aluminum hydride in THF at room temperature in yields of 50–90%.

Thexylhaloborane-methyl sulfide as monohydroboration reagent. Directive effects in the hydroboration of alkynes

Abstract Thexylhaloborane-Methyl sulfide, ThxBHX·SMe2 (X= Cl, Br, I), undergoes direct hydroboration of both terminal and internal alkynes at 25 °C to provide the corresponding alkenyl-thexylhaloboranes in the exceptional isomeric purity.

Status of the PLS-II Synchrotron Light Source

Pohang light source (PLS) had been operated for 14 years successfully. The number of beamlines of PLS was two at the beginning stage. The number of beam-lines has been increased two or three every year. And the total beam-lines in operation became 28 in 2010 and 3199 users had visited PAL for their experiments [1]. The user community gradually extended and they became to require brighter beam to see small signal from a sample. To meet this requirement of the user community, the PLS machine was upgraded as PLS-II. The main goals of the PLS-II machine are to increase the beam energy from 2.5 to 3 GeV, and to increase the number of insertion device (ID) by the factor of two (20 IDs). This PLS-II upgrade project had been completed in 2011 and user service has been started in 2012. We will report the current status of PLS-II machine in this paper.