▁and ▁but yl m agn es ium ▁b rom ide ▁was ▁one ▁of ▁the ▁first ▁demonstr ations ▁of ▁the ▁K um ada ▁coupling ▁using ▁nick el ▁di ph osph ine ▁catal yst s . ▁ ▁This ▁m ild ▁and ▁efficient ▁process ▁contrast ed ▁with ▁older ▁methods . ▁ ▁References ▁ ▁Category : Al k yl ben zen es <0x0A> </s> ▁Hong ▁S ok - j ung ▁( ), ▁born ▁in ▁Se oul ▁in ▁ 1 9 4 1 , ▁is ▁a ▁North ▁Korean ▁writer . ▁He ▁is ▁the ▁grand son ▁of ▁novel ist ▁Hong ▁My ong - hui . ▁ ▁S ok - j ung ▁moved ▁to ▁North ▁Korea ▁with ▁his ▁family ▁after ▁the ▁Second ▁World ▁War . ▁He ▁served ▁in ▁the ▁Korean ▁People ' s ▁Navy , ▁and ▁obtained ▁a ▁degree ▁in ▁literature ▁at ▁Kim ▁Il ▁S ung ▁University . ▁His ▁first ▁published ▁work ▁was ▁a ▁short ▁story , ▁" Red ▁F lower ", ▁in ▁ 1 9 7 0 . ▁In ▁ 1 9 7 9 , ▁he ▁joined ▁the ▁Central ▁Committee ▁of ▁North ▁Korea ' s ▁official ▁literary ▁organisation , ▁the ▁Jose on ▁Writ ers ' ▁Alliance . ▁ ▁In ▁ 1 9 9 3 , ▁he ▁published ▁his ▁most ▁successful ▁work , ▁N ort he aster , ▁an ▁ep ic ▁novel . ▁In ▁ 2 0 0 2 , ▁he ▁published ▁H w ang ▁Jin - i ▁( ), ▁a ▁historical ▁novel ▁set ▁in ▁the ▁six teenth ▁century , ▁which ▁dep ict s ▁cour tes an ▁H w ang