moscow rosneft chief executive igor sechin fail show witness bribery trial former russian economy minister wednesday prompt judge order appear next week sechin boss russia big oil company close ally president vladimir putin tell court would unavailable rest year key witness trial alexei ulyukayev arrest last year late night meet sechin office ulyukayev face 15 years prison accuse accept million sechin return approve sale state-controlled oil company rosneft police detain inside rosneft headquarter shortly sechin hand cash ulyukayev deny accusations say frame sechin lawyers say client testify court prior sechin testimony witness us thank witness sechin ulyukayev lawyer timofei gridnev tell court sechin fail appear wednesday gridnev say third time sechin ignore summon appear judge larisa semyonova read letter sechin lawyers say would unable attend rest year due tight schedule nevertheless summon next monday rosneft make clear late wednesday chance boss would appear court monday rather slim hunt sechin discredit court sechin accuse one rosneft spokesman mikhail leontyev tell reuters shout sechin name court date trash arrest ulyukayev one lead figure faction economic liberals argue less state control economy sechin widely see main champion opposite view state consolidate grip particularly energy sector provide large share russia state revenue two big company rosneft gazprom ulyukayev oppose last year sale medium-sized oil company bashneft rosneft prosecutors say sign deal take cash sechin sechin miss wednesday hear business trip western siberia tuesday attend open new rosneft oil field wednesday meet regional governor chair meet rosneft management siberian city khanty-mansiisk rosneft say rosneft 's sechin no-show witness bribery trial order appear next week