The interview came after the Russian Center for Syrian Reconciliation said that after long months under control of jihadists, a populated area with 90,000 residents in eastern Aleppo was completely liberated by the Syrian Army.
507 terrorists have already left Aleppo and laid down arms, the Center said, adding that 484 fighters among local residents have been immediately granted amnesty.
"A turning point in the fight for Aleppo reflects the growing superiority of the Syrian government troops over the enemy, Korotchenko said referring to a spate of terrorist organizations, including Daesh (ISIL/ISIS) and the al-Nusra Front.
"This is ensured by the high morale of the army of [Syrian President] Bashar Assad, the skillful tactics of urban fighting and increased ability of the Syrian Amy commanders," Korotchenko pointed out.
In addition, the terrorists are facing growing resistance from the local population who ceased providing them with any kind of help at all, he said adding that locals are unwilling to act as human shields for the jihadists.the current moratorium on Russian and Syrian airstrikes in the 10-kilometre (6.2 miles) radius around Aleppo.
He also noted that the jihadists can no longer effectively use their military supply lines which have been blocked by the Syrian government forces.
"All this paves the way for a full-fledged liberation of eastern Aleppo from the terrorists, which in turn will contribute to a large-scale political dialogue between the government of Bashar Assad and the moderate Syrian opposition," Korotchenko said.
He also stressed the importance of reaching a consensus on Syria between Russia and the new US Administration in order to separate the moderate opposition groups from the terrorists, as well as coordinate efforts by a Russian Air Force group and the US-led coalition in Syria.
Meanwhile, Russian Foreign Minister Sergei Lavrov said that US Secretary of State John Kerry had finally made proposals on how to move forward on the crisis in Syria's stricken city of Aleppo that seem acceptable to Russia.
The statement came after the two men met on the sidelines of the Mediterranean Dialogues in Rome, Italy, a conference dealing with security issues faced by countries on the Northern and Southern shores of the Mediterranean.
"Yesterday during our meeting in Rome, John Kerry turned in American proposals in line with proposals defended for a long time by our experts," Lavrov told reporters after he was asked if there was any progress with Washington on dissociation of the terrorists and moderate opposition in Syria.
Between 200,000 and 300,000 civilians are still held by terrorists in the eastern neighborhoods of Aleppo, according to Under-Secretary-General for Humanitarian Affairs and United Nations Emergency Relief Coordinator Stephen O'Brien.