に先立って => before; prior to ~ N2
に[先立「さきだ」]って/に[先立「さきだ」]ち/に[先立「さきだ」]つ => Before A occurs/takes place N2
Time, Situation
も構わず => without caring; without worrying about ~ N2
も同然 => just like; same as ~ N2
と[共「とも」]に => Both, at the same time N2
Information, Report
も[構「かま」]わず => Without considering A N2
Considering, Concerning
を契機に => as a good opportunity/chance to N2
Expected
と同時に => at the same time as; while; simultaneously ~ N2
を[機「き」]に => Use A as an opportunity N1
Time, Situation
~もどうぜんだ(~も同然だ)      => just like; same as ~ N1
を[契機「けいき」] => As a good opportunity A, (do) B N2
Information, Report
も[同然「どうぜん」]だ => The same as saying A, as good as A N2
Adjectival, Descriptions